A fix for android -a was checked in, allowing libyuv gtest flags to be pass.
This CL rolls to the head version of chromium to pull in the change,
allowing better testing and benchmarking of libyuv on android.

TBR=harryjin@google.com
BUG=libyuv:507

Review URL: https://codereview.chromium.org/1416663006 .