GTTF: Enable gyp syntax check on all bots.
GTTF: Enable gyp syntax check on all bots.

This change makes it possible to keep it off-by-default on developer machines.

BUG=268458

Review URL: https://codereview.chromium.org/111933006

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@240168 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build