Fix broken link and add cross-compiling to quick start

BUG=none

Review URL: https://codereview.chromium.org/1177043014

Cr-Original-Commit-Position: refs/heads/master@{#339100}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 925b216305900e3aa7422f46d6c623a096dc3eec
2 files changed
tree: a82bd5ecd498510c99d98b5866966c1799b83739
  1. tools/