Run mojo_common_unittests on Android GN.
Run the this on the main waterfall Android GN (rel) bot.
http://build.chromium.org/p/chromium.linux/builders/Android%20GN
Why mojo_common_unittests over base_unittests?
- base fails 193 tests; mojo_common passed all tests.
- base takes 382 seconds; mojo_common takes 16 seconds.
- base isn't yet built; mojo_common is in mandoline:all.
BUG=359249,387724
R=dpranke@chromium.org
TEST=Android GN bot passes the new step.
Review URL: https://codereview.chromium.org/
1194453003
Cr-Commit-Position: refs/heads/master@{#334965}