[EFL] Fix build error after r148963.
https://bugs.webkit.org/show_bug.cgi?id=115126

Reviewed by Laszlo Gombos.

Generate forwarding headers for 'CoordinatedGraphics' to generate WKView.h

Source/WebKit2:

* PlatformEfl.cmake:

Tools:

* TestWebKitAPI/PlatformEfl.cmake:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@149073 268f45cc-cd09-0410-ab3c-d52691b4dbfc