Move Linux debug tests from Linux Tests (dbg)(2) to Linux Tests (dbg)(1) for...

Move Linux debug tests from Linux Tests (dbg)(2) to Linux Tests (dbg)(1) for consistency with other testers after turning on swarming.

BUG=414808
TBR=phajdan.jr@chromium.org

Review URL: https://codereview.chromium.org/611913002

Cr-Commit-Position: refs/heads/master@{#297142}

testing/buildbot/chromium.linux.json

@@ -161,10 +161,6 @@
     ]
   },
   "Linux Tests (dbg)(1)": {
-    "gtest_tests": [
-    ]
-  },
-  "Linux Tests (dbg)(2)": {
     "gtest_tests": [
       "accessibility_unittests",
       "app_list_unittests",
@@ -264,6 +260,10 @@
       "wm_unittests"
     ]
   },
+  "Linux Tests (dbg)(2)": {
+    "gtest_tests": [
+    ]
+  },
   "Linux Clang (dbg)": {
     "gtest_tests": [
       "accessibility_unittests",