isl_union_*_set_has_dim: rename to isl_union_*_set_has_space
isl_union_*_set_has_dim: rename to isl_union_*_set_has_space

Signed-off-by: Sven Verdoolaege <235c10dd23b819f81cdc9756a251746bc184cab6@gmail.com>

Meinersbur/isl,Meinersbur/isl,Meinersbur/isl,Meinersbur/isl