GitLab

Rolls in two CLs on Android tools:

1) Add aarch64 gold linker:
  https://chromium-review.googlesource.com/247060
2) Remove proguarding from GMS core
  https://chromium-review.googlesource.com/247611

BUG=None

Review URL: https://codereview.chromium.org/906363002

Cr-Commit-Position: refs/heads/master@{#315375}