tree efd76eab65a2c35301afa6ec95ad640ba9cae611
parent c5f3f68b1655a80624b69534790d3ea526b32de2
author Zach Bush <zmbush@google.com> 1576526046 -0800
committer Zach Bush <zmbush@google.com> 1576694061 +0000

[build] Fix rust build files for cobalt

Mostly removes support for unused features of rustc_artifact.gni. Also,
updates gn to a later version that supports rust, and add rustc to
cobalt.ensure.

Adds support for running rust tests in ./cobaltb.py

Bug: 42930
Change-Id: Ic0182a3b6ca0cd9d3dcaa4427fc37943d1fe15c8