[CMake] Share build system options across ports

[CMake] Share build system options across ports
https://bugs.webkit.org/show_bug.cgi?id=72815

Reviewed by Daniel Bates.

Don't define the generic features for every port again.
Add a few macros for reusing the central defined options.

* CMakeLists.txt:
* Source/cmake/OptionsBlackBerry.cmake:
* Source/cmake/OptionsEfl.cmake:
* Source/cmake/OptionsWinCE.cmake:
* Source/cmake/WebKitFeatures.cmake:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@113570 268f45cc-cd09-0410-ab3c-d52691b4dbfc