(Reland) Add microdump_stackwalk target to chromium.android builders.

testing/buildbot/gn_isolate_map.pyl

 ## Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This is a .pyl, or "Python Literal", file. You can treat it just like a
 # .json file, with the following exceptions:
 # * all keys must be quoted (use single quotes, please);
 # * comments are allowed, using '#' syntax; and
 # * trailing commas are allowed.
 
@@ skipping 403 matching lines @@
     ],
   },
   "display_unittests": {
     "label": "//ui/display:display_unittests",
     "type": "console_test_launcher",
   },
   "display_service_unittests": {
     "label": "//services/ui/display:display_service_unittests",
     "type": "console_test_launcher",
   },
+  "dump_syms" : {
+    "label": "//breakpad:dump_syms",
+    "type": "additional_compile_target",
+  },
   "events_unittests": {
     "label": "//ui/events:events_unittests",
     "type": "windowed_test_launcher",
   },
   "exo_unittests": {
     "label": "//components/exo:exo_unittests",
     "type": "windowed_test_launcher",
   },
   "extensions_browsertests": {
     "label": "//extensions:extensions_browsertests",
@@ skipping 654 matching lines @@
   },
   "wm_unittests": {
     "label": "//ui/wm:wm_unittests",
     "type": "windowed_test_launcher",
   },
   "wtf_unittests": {
     "label": "//third_party/WebKit/Source/wtf:wtf_unittests",
     "type": "console_test_launcher",
   },
 }