Merge remote-tracking branch 'aosp/upstream-master' into mymerge

Followed the following steps:
  # In repo client
  cd external/selinux
  repo sync .
  repo start mymerge .
  git merge aosp/upstream-master --no-ff # resolve any conflicts
  repo upload .

Test: device boots and no obvious problems.
Change-Id: I6beff804808e92d1002ead226c7d5c702f373cdc