Remove function create_target and instead directly use add_library

indra/cmake/APR.cmake

indra/cmake/Audio.cmake

indra/cmake/Boost.cmake

indra/cmake/CEFPlugin.cmake

indra/cmake/CURL.cmake

indra/cmake/EXPAT.cmake

indra/cmake/FMODSTUDIO.cmake

indra/cmake/FreeType.cmake

indra/cmake/GLOD.cmake

indra/cmake/GoogleMock.cmake

indra/cmake/Hunspell.cmake

indra/cmake/JPEG.cmake

indra/cmake/JsonCpp.cmake

indra/cmake/LLKDU.cmake

indra/cmake/LLPhysicsExtensions.cmake

indra/cmake/LLPrimitive.cmake

indra/cmake/LLWindow.cmake

indra/cmake/LibVLCPlugin.cmake

indra/cmake/Linking.cmake

indra/cmake/NDOF.cmake