Making gyptest-exclusion platform independent.
Making gyptest-exclusion platform independent.

BUG=None
TEST=None


Review URL: http://codereview.chromium.org/5772005
old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google