OSX/buildsystems: unify openmp handling by changing iomp5 id to @loader_path/../Resources/lib/libiomp5.dylib

This makes install_name_tool usage obsolete here and also assures cmake builds can be codesigned.
IMPORTANT: update lib (darwin-9.x.universal/openmp)

source/creator/CMakeLists.txt

@@ -837,7 +837,7 @@ elseif(APPLE)
 	if(WITH_OPENMP AND CMAKE_C_COMPILER_ID MATCHES "Clang" AND NOT ${CMAKE_C_COMPILER_VERSION} VERSION_LESS '3.4')
 		install(
 			FILES ${LIBDIR}/openmp/lib/libiomp5.dylib
-			DESTINATION blender.app/Contents/MacOS
+			DESTINATION blender.app/Contents/Resources/lib/
 		)
 	endif()