dev-cpp/gmock: upgrade to 1.8.0

BUG=chromium:700573
CQ-DEPEND=CL:490649
CQ-DEPEND=CL:490650
TEST=Remote trybot runs on paladin and release builders.

Change-Id: If5ddd2f645419a63bfe7dac171c728646ac9ed9b
Reviewed-on: https://chromium-review.googlesource.com/461731
Commit-Ready: Ben Chan <benchan@chromium.org>
Tested-by: Ben Chan <benchan@chromium.org>
Reviewed-by: Dan Erat <derat@chromium.org>
5 files changed