Remove unused variable from composed include_directories
cmake: protobuf should be linked with cocos2d.a in every platform (not only on linux)
cmake: connect mac specific UIEditBox implementation to build
cmake:
- fix Audio engine build on Mac
- remove duplicated defintions of _EXPORT_DLL_
cmake: Build application bundles on Mac for test applications (this allow run they from Xcode)
Move BuildHelpers.CMakeLists.txt to Modules/CocosBuildHelpers.cmake, this name is more standard for cmake include files, and in future this file can be installed to use by external applications.
Merge pull request #9080 from vovkasm/cmake-refactoring

Cmake refactorings and fixes