[MIPS] Fix gn_unittests LoaderTest.Foo test

[MIPS] Fix gn_unittests LoaderTest.Foo test

Test was failing with error message:
"Check failed: false. OS architecture not handled."

This change adds support for executing gn tool on mips platform.

BUG=130022
TEST=gn_unittests --gtest_filter=LoaderTest.Foo

Committed: https://crrev.com/8ea3910c7dd3289ee7c49223c77032f0936d84bc
Cr-Commit-Position: refs/heads/master@{#387868}

[lmilko, 2016-04-15 14:01:55]

milko.leporis@imgtec.com changed reviewers:
+ brettw@chromium.org

[lmilko, 2016-04-15 14:01:56]

Please take a look.

[Dirk Pranke, 2016-04-15 21:13:28]

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

[Dirk Pranke, 2016-04-15 21:13:28]

lgtm.

[lmilko, 2016-04-18 07:01:55]

The CQ bit was checked by milko.leporis@imgtec.com

[commit-bot: I haz the power, 2016-04-18 07:02:07]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1890133002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1890133002/1

[commit-bot: I haz the power, 2016-04-18 07:51:34]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-18 07:52:41]

Description was changed from

==========
[MIPS] Fix gn_unittests LoaderTest.Foo test

Test was failing with error message:
"Check failed: false. OS architecture not handled."

This change adds support for executing gn tool on mips platform.

BUG=130022
TEST=gn_unittests --gtest_filter=LoaderTest.Foo
==========

to

==========
[MIPS] Fix gn_unittests LoaderTest.Foo test

Test was failing with error message:
"Check failed: false. OS architecture not handled."

This change adds support for executing gn tool on mips platform.

BUG=130022
TEST=gn_unittests --gtest_filter=LoaderTest.Foo

Committed: https://crrev.com/8ea3910c7dd3289ee7c49223c77032f0936d84bc
Cr-Commit-Position: refs/heads/master@{#387868}
==========

[commit-bot: I haz the power, 2016-04-18 07:52:42]

Patchset 1 (id:??) landed as
https://crrev.com/8ea3910c7dd3289ee7c49223c77032f0936d84bc
Cr-Commit-Position: refs/heads/master@{#387868}