GitLab

Increase EVN to 70.0 for crostini. From now on, EVN major is reved after
each branch point to sync with the Chrome release milestone until we
migrate to DLC.

BUG=chromium:867062
TEST=None

Change-Id: Ie970bc285e7225167054caac8ab8f0ac60f7a64a
Reviewed-on: https://chromium-review.googlesource.com/1148943Reviewed-by: Joshua Pawlicki <waffles@chromium.org>
Commit-Queue: Xiaochu Liu <xiaochu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#577921}