label zram as a swap device.

Addresses the following denials:

  avc:  denied  { write } for  pid=172 comm="mkswap" name="zram0" dev="tmpfs" ino=10221 scontext=u:r:toolbox:s0 tcontext=u:object_r:block_device:s0 tclass=blk_file permissive=1
  avc:  denied  { open } for  pid=172 comm="mkswap" path="/dev/block/zram0" dev="tmpfs" ino=10221 scontext=u:r:toolbox:s0 tcontext=u:object_r:block_device:s0 tclass=blk_file permissive=1

Change-Id: Ida85ab11356d00fa447b48267afcfae55e8382a0
1 file changed