add memory management annotations to function definitions
add memory management annotations to function definitions

These were missing from isl-0.14.1-472-gf7d9e84024 (hide internal
isl_basic_map functions, Tue Apr 28 15:43:41 2015 +0200).

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

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