come on, this is how you drive-by

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1708563002

Review URL: https://codereview.chromium.org/1708563002

bin/sync-and-gyp

@@ -27,6 +27,7 @@ import fnmatch
 import hashlib
 import subprocess
 import os
+import sys
 
 skia_dir = os.path.join(os.path.dirname(__file__), os.pardir)