[chromium] rename newwtf target back to wtf

[chromium] rename newwtf target back to wtf
https://bugs.webkit.org/show_bug.cgi?id=82064

Reviewed by Adam Barth.

Source/JavaScriptCore:

* JavaScriptCore.gyp/JavaScriptCore.gyp:

Source/Platform:

* Platform.gyp/Platform.gyp:

Source/WebCore:

No new tests, only renaming a build target.

* WebCore.gyp/WebCore.gyp:

Source/WTF:

* WTF.gyp/WTF.gyp:

Tools:

* DumpRenderTree/DumpRenderTree.gyp/DumpRenderTree.gyp:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@111887 268f45cc-cd09-0410-ab3c-d52691b4dbfc