isl_stream_read_obj: detect and read schedule objects
isl_stream_read_obj: detect and read schedule objects

This allows isl_cat to read schedules.

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

simbuerg/isl,KangDroidSMProject/ISL,SaberMod/isl-current,BenzoSM/isl,abduld/isl,simbuerg/isl,Distrotech/isl,nicolasvasilache/isl,Meinersbur/isl,tobig/isl,BenzoSM/isl,SaberMod/isl-current,evaautomation/isl,inducer/isl-mirror,evaautomation/isl,PollyLabs/isl,nicolasvasilache/isl,inducer/isl-mirror,evaautomation/isl,abduld/isl,Distrotech/isl,nicolasvasilache/isl,BenzoSM/isl,nicolasvasilache/isl,nicolasvasilache/isl,KangDroidSMProject/ISL,inducer/isl-mirror,Meinersbur/isl,PollyLabs/isl,KangDroidSMProject/ISL,tobig/isl,Distrotech/isl,UBERTC/isl,UBERTC/isl,BenzoSM/isl,Distrotech/isl,simbuerg/isl,PollyLabs/isl,Meinersbur/isl,UBERTC/isl,inducer/isl-mirror,Distrotech/isl,simbuerg/isl,PollyLabs/isl,tobig/isl,abduld/isl,BenzoSM/isl,PollyLabs/isl,Meinersbur/isl,UBERTC/isl,SaberMod/isl-current,evaautomation/isl,tobig/isl,KangDroidSMProject/ISL,simbuerg/isl,SaberMod/isl-current,abduld/isl,inducer/isl-mirror,KangDroidSMProject/ISL