Fix standalone Linux build Need to include gtest before X11 to avoid defines conflict BUG=angleproject:2348 Change-Id: If758c53fb5ef010506f13165186110f00c099e07 Reviewed-on: https://chromium-review.googlesource.com/919687 Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Commit-Queue: Yuly Novikov <ynovikov@chromium.org>