clang: disable a handful of targets.
clang: disable a handful of targets.

To avoid error for too many exports from libLLVM-13.dll.

Remove no-longer-necessary -D/-U compiler options from libc++

oroppas/MINGW-packages,oscarfv/MINGW-packages,fabiangreffrath/MINGW-packages,Chocobo1/MINGW-packages,lhmouse/MINGW-packages,stahta01/MINGW-packages,JPeterMugaas/MINGW-packages,stahta01/MINGW-packages,Chocobo1/MINGW-packages,fabiangreffrath/MINGW-packages,Alexpux/MINGW-packages,Alexpux/MINGW-packages,JPeterMugaas/MINGW-packages,JPeterMugaas/MINGW-packages,lhmouse/MINGW-packages,stahta01/MINGW-packages,Alexpux/MINGW-packages,oroppas/MINGW-packages,lhmouse/MINGW-packages,oscarfv/MINGW-packages,stahta01/MINGW-packages,lhmouse/MINGW-packages,oroppas/MINGW-packages,lhmouse/MINGW-packages,oroppas/MINGW-packages,InitialForce/MINGW-packages,Alexpux/MINGW-packages,InitialForce/MINGW-packages,lhmouse/MINGW-packages,fabiangreffrath/MINGW-packages,JPeterMugaas/MINGW-packages,Alexpux/MINGW-packages,stahta01/MINGW-packages,oscarfv/MINGW-packages,oscarfv/MINGW-packages,oroppas/MINGW-packages,fabiangreffrath/MINGW-packages,stahta01/MINGW-packages,Chocobo1/MINGW-packages,oscarfv/MINGW-packages,InitialForce/MINGW-packages,Alexpux/MINGW-packages,fabiangreffrath/MINGW-packages,JPeterMugaas/MINGW-packages,oscarfv/MINGW-packages,oroppas/MINGW-packages,fabiangreffrath/MINGW-packages,JPeterMugaas/MINGW-packages