Properly configure goma.
Properly configure goma.

Everything is c/p from common.gypi.

Review URL: https://codereview.chromium.org/862973002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#26198}

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh