The latest MSVC 2017 complains about std::tr1::tuple, which was fixed in
upstream GTest.

Upstream have also merged all our patches, we now no longer are carrying
a diff. (Thanks, Gennadiy!)

Change-Id: I6932687b8e8c1eff8c2edf42da0a12080e7b61dd
Reviewed-on: https://boringssl-review.googlesource.com/24685
Reviewed-by: Steven Valdez <svaldez@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>