Bug 980953 - Switch to using caf for the gtest repo since linaro is unreliable. r=mwu

Change-Id: Iae11262fa5cf9a10f0acb2d327b309376be87f1c
Merge pull request #156 from staktrace/peak

Bug 980953 - Switch to using caf for the gtest repo since linaro is unre...
use local aosp mirror

Change-Id: I9d43700cff3b1678830adf8c2906748424f17138