Refactor chromeos GN test configs. Consolidate vm_sanity_test's targets.

We're planning on adding more non-gtest tests. The cleanup here will make
that simpler/easier.

Bug: 876587
Change-Id: Ie23bd9ed1e38a3dc9df90a087cd8637557683c8a
Reviewed-on: https://chromium-review.googlesource.com/1227148
Reviewed-by: John Budorick <[email protected]>
Commit-Queue: Ben Pastene <[email protected]>
Cr-Commit-Position: refs/heads/master@{#593040}
3 files changed