Build gtest with NDK 9 for all architectures.
Build gtest with NDK 9 for all architectures.

That gives us real regular expressions on all architectures, which lets us
pass more of gtest's own unit tests.

Change-Id: I05f0232ba9cac485018e3764fa7e8910d19bd8f3

android-ia/platform_external_gtest,geekboxzone/mmallow_external_gtest,geekboxzone/lollipop_external_gtest,omapzoom/platform-external-gtest,android-ia/platform_external_gtest,Omegaphora/external_gtest,geekboxzone/mmallow_external_gtest,geekboxzone/lollipop_external_gtest,omapzoom/platform-external-gtest,Omegaphora/external_gtest