mark isl_map_copy_basic_map and isl_map_drop_basic_map as deprecated
mark isl_map_copy_basic_map and isl_map_drop_basic_map as deprecated

These functions are too closely tied to the internal representation and
will be removed in a future release.

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

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