sched, cgroups: Fix module export

sched, cgroups: Fix module export

I have exported it in d11c563 - but cgroups.c did not have module.h included ...

Cc: Paul E. McKenney <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
LKML-Reference: <1266887105[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>