[foozzie] Suppress native function string representation

BUG=chromium:667678
NOTRY=true
TBR=titzer@chromium.org,bradnelson@chromium.org

Review-Url: https://codereview.chromium.org/2633313002
Cr-Commit-Position: refs/heads/master@{#42392}

tools/foozzie/v8_suppressions.py

@@ -73,6 +73,8 @@ IGNORE_OUTPUT = {
   '': {
     'crbug.com/664068':
         re.compile(r'RangeError', re.S),
+    'crbug.com/667678':
+        re.compile(r'\[native code\]', re.S),
   },
   'validate_asm': {
     'validate_asm':