isl_test.c: generalize map conversion test
isl_test.c: generalize map conversion test

This will make it easier to add additional conversion tests.

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

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