Update shaderc to ToT.

Update shaderc to ToT.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1847643002

Committed: https://skia.googlesource.com/skia/+/b90e67f8ea9dfdf5f398cfee444e86547bf4606a

[egdaniel, 2016-03-30 19:00:38]

Description was changed from

==========
Update shaderc to ToT.

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

to

==========
Update shaderc to ToT.

BUG=skia:
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

[egdaniel, 2016-03-30 19:02:13]

egdaniel@google.com changed reviewers:
+ bsalomon@google.com

[egdaniel, 2016-03-30 19:02:13]

This gets us to ToT shaderc (no actual perf wins from version we were using).
Does remove need for glslang fork in bsalomon github repo

[bsalomon, 2016-03-31 03:21:37]

lgtm

[egdaniel, 2016-03-31 13:02:28]

The CQ bit was checked by egdaniel@google.com

[commit-bot: I haz the power, 2016-03-31 13:02:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1847643002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1847643002/1

[commit-bot: I haz the power, 2016-03-31 13:16:33]

Description was changed from

==========
Update shaderc to ToT.

BUG=skia:
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

to

==========
Update shaderc to ToT.

BUG=skia:
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...

Committed:
https://skia.googlesource.com/skia/+/b90e67f8ea9dfdf5f398cfee444e86547bf4606a
==========

[commit-bot: I haz the power, 2016-03-31 13:16:36]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/b90e67f8ea9dfdf5f398cfee444e86547bf4606a