This relands the CL
https://codereview.chromium.org/797503007/.

It runs the version generation two times. First during
runhooks as a fallback for recipes that loose git context
(e.g. android_aosp). Second during compilation like in the
original CL. In case of failures, the result from the
runhooks call will be reused.

BUG=chromium:446166
LOG=n

Review URL: https://codereview.chromium.org/843913009

Cr-Commit-Position: refs/heads/master@{#26120}