Run nacl_loader_unittests on the linux asan bot.

It runs and passes on the clang tot asan bot, so it should work on the memory
waterfall asan bot too.

Bug: 843511
Change-Id: Id98c5f1fc6f461414debd270a54baabc3715e871
Reviewed-on: https://chromium-review.googlesource.com/1093774Reviewed-by: Kenneth Russell <kbr@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#565771}

testing/buildbot/chromium.memory.json

@@ -3083,6 +3083,16 @@
         },
         "test": "nacl_helper_nonsfi_unittests"
       },
+      {
+        "args": [
+          "--test-launcher-batch-limit=1",
+          "--test-launcher-print-test-stdio=always"
+        ],
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
+        "test": "nacl_loader_unittests"
+      },
       {
         "args": [
           "--test-launcher-batch-limit=1",

testing/buildbot/test_suite_exceptions.pyl

@@ -1746,7 +1746,6 @@
       'ToTMacASan',  # The mac asan tot bot sets enable_nacl=false
       'linux-win_cross-rel',  # Sets enable_nacl=false, https://crbug.com/774186
       # chromium.memory
-      'Linux ASan LSan Tests (1)',  # TODO(thakis): Try removing this exception.
       'Linux TSan Tests',  # The TSan bot sets enable_nacl=false
       'Mac ASan 64 Tests (1)',  # The mac asan bot sets enable_nacl=false
     ],