[Chromium] Yarr should build using a separate GYP file from JavaScriptCore
https://bugs.webkit.org/show_bug.cgi?id=113652

Reviewed by Nico Weber.

Source/JavaScriptCore:

This patch moves JavaScriptCore.gyp to yarr.gyp because Chromium only
uses this GYP file to build yarr.

* JavaScriptCore.gyp/JavaScriptCoreGTK.gyp:
* JavaScriptCore.gypi:
* yarr/yarr.gyp: Renamed from Source/JavaScriptCore/JavaScriptCore.gyp/JavaScriptCore.gyp.

Source/WebCore:

* WebCore.gyp/WebCore.gyp:
    - Update references to yarr.gyp.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@147294 268f45cc-cd09-0410-ab3c-d52691b4dbfc