GitLab

Summary of changes available at:
https://boringssl.googlesource.com/boringssl/+log/68de407..771a138

This also removes update_gypi_and_asm.py in favor of the script inside
BoringSSL proper.

BUG=none

Review URL: https://codereview.chromium.org/1136743004

Cr-Commit-Position: refs/heads/master@{#329652}