COMP: Ensure CMAKE_MACOSX_RPATH is passed to CTK inner-build
COMP: Ensure CMAKE_MACOSX_RPATH is passed to CTK inner-build

This commit fixes an issue introduced in 4c043cc (COMP: Initialize and
propagate CMAKE_MACOSX_RPATH to external projects)

commontk/CTK,CJGoch/CTK,CJGoch/CTK,CJGoch/CTK,SINTEFMedtek/CTK,SINTEFMedtek/CTK,SINTEFMedtek/CTK,commontk/CTK,commontk/CTK,commontk/CTK,CJGoch/CTK,SINTEFMedtek/CTK,CJGoch/CTK,SINTEFMedtek/CTK