Adrian Secord df8b4ddb50 Updated Arcanist config to use submodules.
Summary:
Added arc-xcode-test-engine and clang-format-linter as submodules.
Updated .arcconfig to point to submodules.

NOTE: Until scripts/install_arc.sh is landed, arc users will need to run
```
git submodule init
git submodule update
```
to pull in arc's extensions as submodules.

Reviewers: featherless, #mdc_ios_owners

Reviewed By: featherless, #mdc_ios_owners

Projects: #material_components_ios

Differential Revision: http://codereview.cc/D287
2016-03-17 12:33:28 -04:00
..