API test gardening AppleWin port.

The BitmapImageEmptyFrameTest should only be tested on Cairo not on AppleWin port.

* TestWebKitAPI/TestWebKitAPI.vcxproj/TestWebKitAPI.vcxproj:
* TestWebKitAPI/win/TestWebKitAPI.vcproj:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@146386 268f45cc-cd09-0410-ab3c-d52691b4dbfc