devicekit: allow devicekit_disk_t rw access to /dev generic block devices

Read access would have been enough but doesn't exist

type=AVC msg=audit(1382558050.106:116): avc:  denied  { read } for  pid=2517 comm="udisksd" name="sdb" dev="devtmpfs" ino=78254 scontext=system_u:system_r:devicekit_disk_t:s0 tcontext=system_u:object_r:device_t:s0 tclass=blk_file
type=AVC msg=audit(1382558050.106:116): avc:  denied  { open } for  pid=2517 comm="udisksd" path="/dev/sdb" dev="devtmpfs" ino=78254 scontext=system_u:system_r:devicekit_disk_t:s0 tcontext=system_u:object_r:device_t:s0 tclass=blk_file

Signed-off-by: Nicolas Iooss <nicolas.iooss_git@polytechnique.org>
devicekit: allow read access to logind sessions

Signed-off-by: Nicolas Iooss <nicolas.iooss_git@polytechnique.org>