GN: restore gn.py partly as fetch-gn

GN: restore gn.py partly as fetch-gn

Same as before, except it explicitly only fetches GN instead of acting
like a proxy for it.  I found myself always typing 'gn' anyway.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2167353002

Committed: https://skia.googlesource.com/skia/+/6af0c958a0d024f65a9049f5b84793e03b781801

[mtklein_C, 2016-07-21 21:00:11]

Description was changed from

==========
GN: restore gn.py partly as fetch-gn

Same as before, except it explicitly only fetches GN instead of acting
like a proxy for it.  I found myself always typing 'gn' anyway.

BUG=skia:
==========

to

==========
GN: restore gn.py partly as fetch-gn

Same as before, except it explicitly only fetches GN instead of acting
like a proxy for it.  I found myself always typing 'gn' anyway.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2167353002
==========

[mtklein_C, 2016-07-21 21:00:23]

mtklein@chromium.org changed reviewers:
+ jcgregorio@google.com

[mtklein_C, 2016-07-21 21:00:23]

The CQ bit was checked by mtklein@chromium.org

[commit-bot: I haz the power, 2016-07-21 21:00:35]

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

[jcgregorio, 2016-07-21 21:00:55]

lgtm

[commit-bot: I haz the power, 2016-07-22 10:34:27]

Description was changed from

==========
GN: restore gn.py partly as fetch-gn

Same as before, except it explicitly only fetches GN instead of acting
like a proxy for it.  I found myself always typing 'gn' anyway.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2167353002
==========

to

==========
GN: restore gn.py partly as fetch-gn

Same as before, except it explicitly only fetches GN instead of acting
like a proxy for it.  I found myself always typing 'gn' anyway.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2167353002

Committed:
https://skia.googlesource.com/skia/+/6af0c958a0d024f65a9049f5b84793e03b781801
==========

[commit-bot: I haz the power, 2016-07-22 10:34:28]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/6af0c958a0d024f65a9049f5b84793e03b781801