Merge remote-tracking branch '318/dev/msm-3.18-sched' into msm318

* 318/dev/msm-3.18-sched:
  proc: relax write permissions of sched_group_id file
  sched: inherit the group id from the group leader

Change-Id: I9d9293ebba2f1e29403303e5412fac5a1ee8444c
Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>