[GN] Fix tools/gn/bootstrap/bootstrap.py.

[GN] Fix tools/gn/bootstrap/bootstrap.py.

Update the list of files required to boostrap gn (best-effort).
Tested that gn is build successfully on macOS.

BUG=None

Committed: https://crrev.com/eace899f8a53284c3618940122caa858c03c602c
Cr-Commit-Position: refs/heads/master@{#435273}

[sdefresne, 2016-11-30 15:40:20]

The CQ bit was checked by sdefresne@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-11-30 15:40:45]

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

[sdefresne, 2016-11-30 15:41:32]

sdefresne@chromium.org changed reviewers:
+ dpranke@chromium.org

[sdefresne, 2016-11-30 15:41:32]

Please take a look and send to CQ if LGTY.

[commit-bot: I haz the power, 2016-11-30 15:50:34]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-11-30 15:50:34]

Dry run: This issue passed the CQ dry run.

[Nico, 2016-11-30 15:52:39]

thakis@chromium.org changed reviewers:
+ thakis@chromium.org

[Nico, 2016-11-30 15:52:39]

The CQ bit was checked by thakis@chromium.org

[Nico, 2016-11-30 15:52:39]

lgtm

[commit-bot: I haz the power, 2016-11-30 15:53:09]

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, 2016-11-30 16:00:26]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1480521159428920, "parent_rev":
"f33939645c9bc46b74eb787ede87e2470639b166", "commit_rev":
"c3fafed3c07fc244a46a9db2351adc0b2de7840f"}

[commit-bot: I haz the power, 2016-11-30 16:01:16]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-30 16:04:35]

Description was changed from

==========
[GN] Fix tools/gn/bootstrap/bootstrap.py.

Update the list of files required to boostrap gn (best-effort).
Tested that gn is build successfully on macOS.

BUG=None
==========

to

==========
[GN] Fix tools/gn/bootstrap/bootstrap.py.

Update the list of files required to boostrap gn (best-effort).
Tested that gn is build successfully on macOS.

BUG=None

Committed: https://crrev.com/eace899f8a53284c3618940122caa858c03c602c
Cr-Commit-Position: refs/heads/master@{#435273}
==========

[commit-bot: I haz the power, 2016-11-30 16:04:36]

Patchset 1 (id:??) landed as
https://crrev.com/eace899f8a53284c3618940122caa858c03c602c
Cr-Commit-Position: refs/heads/master@{#435273}

[Dirk Pranke, 2016-12-01 00:06:17]

lgtm also.