[swarming] Only isolate d8 with target toolset.

BUG=chromium:535160,chromium:537247
LOG=n

Review URL: https://codereview.chromium.org/1383473002

Cr-Commit-Position: refs/heads/master@{#31020}

diff --git a/src/d8.gyp b/src/d8.gyp
index 9594f4f..104bc94 100644 (file)
--- a/src/d8.gyp
+++ b/src/d8.gyp
@@ -141,7 +141,7 @@
     },
   ],
   'conditions': [
-    ['test_isolation_mode != "noop"', {
+    ['test_isolation_mode != "noop" and v8_toolset_for_d8 == "target"', {
       'targets': [
         {
           'target_name': 'd8_run',