fix isl_union_map_detect_equalities memory management annotation
fix isl_union_map_detect_equalities memory management annotation

The signature of that function had accidently an __isl_keep annotation
instead of an __isl_take. Fix this such that the signature in the
header matches the signature of the implementation.

Signed-off-by: Tobias Grosser <059b8b880f8441509ec8a65b50b4c6ae74ebea76@grosser.es>
Signed-off-by: Sven Verdoolaege <e5350bbed4977f5eb8ae1dc6abd9ae59d21ace75@kotnet.org>

jleben/isl,serge-sans-paille/isl,inducer/isl-mirror,VanirLLVM/toolchain_isl,pierrotdelalune/isl,cfx-next/toolchain_isl-upstream,crossbuild/isl,Distrotech/isl,evaautomation/isl,SaberMod/isl-current,simbuerg/isl,SaberMod/isl-current,serge-sans-paille/isl,pierrotdelalune/isl,Meinersbur/isl,Distrotech/isl,abduld/isl,abduld/isl,inducer/isl-mirror,BenzoSM/isl,cfx-next/toolchain_isl-upstream,VanirLLVM/toolchain_isl,Meinersbur/isl,crossbuild/isl,epowers/isl,jleben/isl,KangDroidSMProject/ISL,nicolasvasilache/isl,PollyLabs/isl,Meinersbur/isl,pierrotdelalune/isl,simbuerg/isl,jleben/isl,evaautomation/isl,KangDroidSMProject/ISL,nicolasvasilache/isl,Meinersbur/isl,nicolasvasilache/isl,pierrotdelalune/isl,evaautomation/isl,tobig/isl,cfx-next/toolchain_isl-upstream,cfx-next/toolchain_isl-upstream,tobig/isl,epowers/isl,epowers/isl,serge-sans-paille/isl,simbuerg/isl,pierrotdelalune/isl,simbuerg/isl,VanirLLVM/toolchain_isl,tobig/isl,KangDroidSMProject/ISL,UBERTC/isl,Distrotech/isl,VanirLLVM/toolchain_isl,jleben/isl,BobSaget-Mod/libisl,epowers/isl,UBERTC/isl,crossbuild/isl,simbuerg/isl,BobSaget-Mod/libisl,tobig/isl,inducer/isl-mirror,crossbuild/isl,inducer/isl-mirror,jleben/isl,PollyLabs/isl,UBERTC/isl,BobSaget-Mod/libisl,KangDroidSMProject/ISL,SaberMod/isl-current,evaautomation/isl,abduld/isl,serge-sans-paille/isl,BobSaget-Mod/libisl,Distrotech/isl,serge-sans-paille/isl,PollyLabs/isl,BenzoSM/isl,nicolasvasilache/isl,BenzoSM/isl,UBERTC/isl,SaberMod/isl-current,inducer/isl-mirror,nicolasvasilache/isl,epowers/isl,abduld/isl,Distrotech/isl,KangDroidSMProject/ISL,BobSaget-Mod/libisl,VanirLLVM/toolchain_isl,PollyLabs/isl,BenzoSM/isl,cfx-next/toolchain_isl-upstream,PollyLabs/isl,BenzoSM/isl