Revert "[Fuchsia] Disable capture of system logs via SSH'd 'dlog' on ARM64."

This reverts commit 90619203.

Reason for revert: This work-around simply delays the inevitable; test runs still tend to have their SSH connection fail eventually, and so fail.

Original change's description:
> [Fuchsia] Disable capture of system logs via SSH'd 'dlog' on ARM64.
> 
> The 'dlog' SSH channel appears to trigger a bug that causes the package-
> upload step to fail on ARM64 under QEMU.
> 
> Bug: 900790
> Change-Id: Ie5871cef98e94deb936ae591c87a5c90a960b092
> Reviewed-on: https://chromium-review.googlesource.com/c/1325529
> Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
> Reviewed-by: John Budorick <jbudorick@chromium.org>
> Commit-Queue: Wez <wez@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#606522}

TBR=wez@chromium.org,sergeyu@chromium.org,jbudorick@chromium.org

Change-Id: I3f9912cb004e64219238c24af95d6084097e768c
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 900790
Reviewed-on: https://chromium-review.googlesource.com/c/1327412Reviewed-by: Wez <wez@chromium.org>
Commit-Queue: Wez <wez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#606560}

testing/buildbot/chromium.fyi.json

@@ -3303,9 +3303,6 @@
     ],
     "gtest_tests": [
       {
-        "args": [
-          "--exclude-system-logs"
-        ],
         "swarming": {
           "can_use_on_swarming_builders": true
         },
@@ -3313,8 +3310,7 @@
       },
       {
         "args": [
-          "--test-launcher-filter-file=../../testing/buildbot/filters/fuchsia.content_unittests.filter",
-          "--exclude-system-logs"
+          "--test-launcher-filter-file=../../testing/buildbot/filters/fuchsia.content_unittests.filter"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true
@@ -3322,45 +3318,30 @@
         "test": "content_unittests"
       },
       {
-        "args": [
-          "--exclude-system-logs"
-        ],
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "cronet_tests"
       },
       {
-        "args": [
-          "--exclude-system-logs"
-        ],
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "cronet_unittests"
       },
       {
-        "args": [
-          "--exclude-system-logs"
-        ],
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "crypto_unittests"
       },
       {
-        "args": [
-          "--exclude-system-logs"
-        ],
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "fidlgen_js_unittests"
       },
       {
-        "args": [
-          "--exclude-system-logs"
-        ],
         "swarming": {
           "can_use_on_swarming_builders": true
         },
@@ -3368,8 +3349,7 @@
       },
       {
         "args": [
-          "--test-launcher-filter-file=../../testing/buildbot/filters/fuchsia.ipc_tests.filter",
-          "--exclude-system-logs"
+          "--test-launcher-filter-file=../../testing/buildbot/filters/fuchsia.ipc_tests.filter"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true
@@ -3377,9 +3357,6 @@
         "test": "ipc_tests"
       },
       {
-        "args": [
-          "--exclude-system-logs"
-        ],
         "swarming": {
           "can_use_on_swarming_builders": true
         },
@@ -3387,8 +3364,7 @@
       },
       {
         "args": [
-          "--test-launcher-filter-file=../../testing/buildbot/filters/fuchsia.mojo_unittests.filter",
-          "--exclude-system-logs"
+          "--test-launcher-filter-file=../../testing/buildbot/filters/fuchsia.mojo_unittests.filter"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true
@@ -3396,27 +3372,18 @@
         "test": "mojo_unittests"
       },
       {
-        "args": [
-          "--exclude-system-logs"
-        ],
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "service_manager_unittests"
       },
       {
-        "args": [
-          "--exclude-system-logs"
-        ],
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "skia_unittests"
       },
       {
-        "args": [
-          "--exclude-system-logs"
-        ],
         "swarming": {
           "can_use_on_swarming_builders": true
         },
@@ -3424,8 +3391,7 @@
       },
       {
         "args": [
-          "--test-launcher-filter-file=../../testing/buildbot/filters/fuchsia.ui_base_unittests.filter",
-          "--exclude-system-logs"
+          "--test-launcher-filter-file=../../testing/buildbot/filters/fuchsia.ui_base_unittests.filter"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true
@@ -3433,18 +3399,12 @@
         "test": "ui_base_unittests"
       },
       {
-        "args": [
-          "--exclude-system-logs"
-        ],
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "webrunner_browsertests"
       },
       {
-        "args": [
-          "--exclude-system-logs"
-        ],
         "swarming": {
           "can_use_on_swarming_builders": true
         },

testing/buildbot/waterfalls.pyl

@@ -1276,10 +1276,6 @@
         'additional_compile_targets': [
           'all',
         ],
-        # TODO(https://crbug.com/900790): Logging via SSH breaks things.
-        'args': [
-          '--exclude-system-logs',
-        ],
         'test_suites': {
           'gtest_tests': 'fuchsia_gtests',
         },