gyp: add osmesa target to factor out common code

gyp: add osmesa target to factor out common code

Test this out with `GYP_DEFINES=skia_mesa=1`.

Also uses the `library_dirs` keyword, which is relatively new.
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1903233002

Committed: https://skia.googlesource.com/skia/+/906021334fcf45e97670f877ea6f41bb2bc3b060

[hal.canary, 2016-04-20 14:22:14]

Description was changed from

==========
gyp: add osmesa target to factor out common code

Test this out with `GYP_DEFINES=skia_mesa=1`.

Also uses the `library_dirs` keyword, which is relatively new.
==========

to

==========
gyp: add osmesa target to factor out common code

Test this out with `GYP_DEFINES=skia_mesa=1`.

Also uses the `library_dirs` keyword, which is relatively new.
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

[hal.canary, 2016-04-20 14:24:53]

The CQ bit was checked by halcanary@google.com to run a CQ dry run

[commit-bot: I haz the power, 2016-04-20 14:24:57]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1903233002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1903233002/1

[hal.canary, 2016-04-20 14:25:27]

The CQ bit was unchecked by halcanary@google.com

[hal.canary, 2016-04-20 14:51:11]

The CQ bit was checked by halcanary@google.com to run a CQ dry run

[hal.canary, 2016-04-20 14:51:19]

Patchset #1 (id:1) has been deleted

[commit-bot: I haz the power, 2016-04-20 14:51:19]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1903233002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1903233002/20001

[hal.canary, 2016-04-20 14:51:42]

halcanary@google.com changed reviewers:
+ jcgregorio@google.com

[hal.canary, 2016-04-20 14:51:42]

PTAL

[commit-bot: I haz the power, 2016-04-20 15:00:10]

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

[commit-bot: I haz the power, 2016-04-20 15:00:11]

Dry run: This issue passed the CQ dry run.

[jcgregorio, 2016-04-20 15:09:08]

LGTM for FIDDLE_BUILD_TEST, but really should have someone more familiar with
gyp take a look.

[hal.canary, 2016-04-20 15:17:22]

halcanary@google.com changed reviewers:
+ mtklein@google.com

[hal.canary, 2016-04-20 15:17:23]

You know gyp as well as anyone.  Any objection to this?

[mtklein, 2016-04-20 15:48:24]

no, this very lgtm

[hal.canary, 2016-04-20 15:48:49]

The CQ bit was checked by halcanary@google.com

[commit-bot: I haz the power, 2016-04-20 15:48:59]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1903233002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1903233002/20001

[commit-bot: I haz the power, 2016-04-20 15:49:55]

Description was changed from

==========
gyp: add osmesa target to factor out common code

Test this out with `GYP_DEFINES=skia_mesa=1`.

Also uses the `library_dirs` keyword, which is relatively new.
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

to

==========
gyp: add osmesa target to factor out common code

Test this out with `GYP_DEFINES=skia_mesa=1`.

Also uses the `library_dirs` keyword, which is relatively new.
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...

Committed:
https://skia.googlesource.com/skia/+/906021334fcf45e97670f877ea6f41bb2bc3b060
==========

[commit-bot: I haz the power, 2016-04-20 15:49:56]

Committed patchset #1 (id:20001) as
https://skia.googlesource.com/skia/+/906021334fcf45e97670f877ea6f41bb2bc3b060