Add comment on TBR'ing GN bootstrap changes.

Add comment on TBR'ing GN bootstrap changes.

It should be clear that people can TBR certain types of updates to the
bootstrap script.

Review-Url: https://codereview.chromium.org/2776313004
Cr-Commit-Position: refs/heads/master@{#460444}
Committed: https://chromium.googlesource.com/chromium/src/+/b17ee3d6890cf542ff39366a5f6579d540314829

[brettw, 2017-03-29 17:19:52]

brettw@chromium.org changed reviewers:
+ phajdan.jr@chromium.org

[Paweł Hajdan Jr., 2017-03-29 17:20:44]

LGTM, thanks!

[brettw, 2017-03-29 17:26:33]

The CQ bit was checked by brettw@chromium.org

[commit-bot: I haz the power, 2017-03-29 17:26:55]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-03-29 17:40:16]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1490808393118770, "parent_rev":
"d851aa1e5290a777a7a82afdbe6c27df2cf82bf2", "commit_rev":
"b17ee3d6890cf542ff39366a5f6579d540314829"}

[commit-bot: I haz the power, 2017-03-29 17:41:11]

Description was changed from

==========
Add comment on TBR'ing GN bootstrap changes.

It should be clear that people can TBR certain types of updates to the
bootstrap script.
==========

to

==========
Add comment on TBR'ing GN bootstrap changes.

It should be clear that people can TBR certain types of updates to the
bootstrap script.

Review-Url: https://codereview.chromium.org/2776313004
Cr-Commit-Position: refs/heads/master@{#460444}
Committed:
https://chromium.googlesource.com/chromium/src/+/b17ee3d6890cf542ff39366a5f65...
==========

[commit-bot: I haz the power, 2017-03-29 17:41:13]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/b17ee3d6890cf542ff39366a5f65...