isl_printer_print_constraint: print the constraint directly
isl_printer_print_constraint: print the constraint directly

That is, do not convert the constraint to a basic map first.
This conversion would introduce the div constraints on
the integer divisions involved in the constraint, resulting
in a constraint being printed as several constraints
in dump mode, which is confusing.

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

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