make isl_aff_private.h more self-contained
make isl_aff_private.h more self-contained

Signed-off-by: Sven Verdoolaege <e5350bbed4977f5eb8ae1dc6abd9ae59d21ace75@kotnet.org>

crossbuild/isl,UBERTC/isl,crossbuild/isl,BenzoSM/isl,Meinersbur/isl,KangDroidSMProject/ISL,jleben/isl,SaberMod/isl-current,inducer/isl-mirror,simbuerg/isl,abduld/isl,BenzoSM/isl,tobig/isl,simbuerg/isl,tobig/isl,inducer/isl-mirror,Distrotech/isl,Distrotech/isl,evaautomation/isl,simbuerg/isl,UBERTC/isl,PollyLabs/isl,evaautomation/isl,BenzoSM/isl,UBERTC/isl,nicolasvasilache/isl,abduld/isl,crossbuild/isl,tobig/isl,KangDroidSMProject/ISL,BenzoSM/isl,PollyLabs/isl,jleben/isl,crossbuild/isl,Distrotech/isl,evaautomation/isl,abduld/isl,nicolasvasilache/isl,SaberMod/isl-current,inducer/isl-mirror,tobig/isl,SaberMod/isl-current,Distrotech/isl,jleben/isl,simbuerg/isl,simbuerg/isl,KangDroidSMProject/ISL,Meinersbur/isl,evaautomation/isl,abduld/isl,Meinersbur/isl,PollyLabs/isl,Meinersbur/isl,nicolasvasilache/isl,UBERTC/isl,KangDroidSMProject/ISL,nicolasvasilache/isl,PollyLabs/isl,jleben/isl,jleben/isl,SaberMod/isl-current,KangDroidSMProject/ISL,PollyLabs/isl,Distrotech/isl,inducer/isl-mirror,BenzoSM/isl,inducer/isl-mirror,nicolasvasilache/isl