cm: sepolicy: Fix the vold blkid.tab denial from recovery

 * denied  { link } for  pid=190 comm="minivold"
    name="vold_blkid.tab" dev="tmpfs" scontext=u:r:vold:s0
    tcontext=u:object_r:vold_tmpfs:s0 tclass=file

Change-Id: I0b3e47dd00c5a32261691f51838a8d9af9778faa