isl_union_*_neg: use isl_union_*_transform_inplace
isl_union_*_neg: use isl_union_*_transform_inplace

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

nicolasvasilache/isl,BenzoSM/isl,BenzoSM/isl,BenzoSM/isl,Distrotech/isl,KangDroidSMProject/ISL,UBERTC/isl,nicolasvasilache/isl,PollyLabs/isl,tobig/isl,tobig/isl,Distrotech/isl,inducer/isl-mirror,PollyLabs/isl,BenzoSM/isl,UBERTC/isl,PollyLabs/isl,tobig/isl,BenzoSM/isl,KangDroidSMProject/ISL,nicolasvasilache/isl,inducer/isl-mirror,KangDroidSMProject/ISL,Meinersbur/isl,inducer/isl-mirror,Distrotech/isl,inducer/isl-mirror,Meinersbur/isl,UBERTC/isl,nicolasvasilache/isl,PollyLabs/isl,tobig/isl,KangDroidSMProject/ISL,Distrotech/isl,Meinersbur/isl,UBERTC/isl,inducer/isl-mirror,PollyLabs/isl,Distrotech/isl,KangDroidSMProject/ISL,Meinersbur/isl,nicolasvasilache/isl