Document that cross builds on Linux now basically work.

TBR=hans

Bug: 495204
Change-Id: Iea91a81f462f87c7833e7c5f85006dd27029c772
Reviewed-on: https://chromium-review.googlesource.com/734224
Reviewed-by: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#510887}
1 file changed