Add .dSYM paths for test isolate files that have ASan support on Mac

BUG=444835
[email protected],[email protected]

Review URL: https://codereview.chromium.org/906973003

Cr-Commit-Position: refs/heads/master@{#315547}
diff --git a/gpu/gpu_unittests.isolate b/gpu/gpu_unittests.isolate
index 48fb1c5..e64633c 100644
--- a/gpu/gpu_unittests.isolate
+++ b/gpu/gpu_unittests.isolate
@@ -58,6 +58,13 @@
         ],
       },
     }],
+    ['OS=="mac" and asan==1 and fastbuild==0', {
+      'variables': {
+        'files': [
+          '<(PRODUCT_DIR)/gpu_unittests.dSYM/',
+        ],
+      },
+    }],
     ['OS=="win" and (fastbuild==0 or fastbuild==1)', {
       'variables': {
         'files': [