commit 5b4bea438a4bcb7dd49ab022b46884e3f683dc44
author Tao Bao <tbao@google.com> Thu Oct 05 13:50:07 2017 -0700
committer Tao Bao <tbao@google.com> Tue Oct 10 14:42:24 2017 -0700
tree e995acc9a81f33c72a591c18bffb171e35e8e887
parent 62d3b4f103e30b4d0795a8d6438d5a3060b536b1

Create sysfs_dm label.

Prior to this CL, /sys/devices/virtual/block/dm-X was using the generic
sysfs label. This CL creates sysfs_dm label and grants the following
accesses:
 - update_verifier to read sysfs_dm dir and file at
   /sys/devices/virtual/block/dm-X.
 - vold to write sysfs_dm.

Bug: 63440407
Test: update_verifier successfully triggers blocks verification and
      marks a sucessful boot;
Test: No sysfs_dm related denials on sailfish.
Change-Id: I6349412707800f1bd3a2fb94d4fe505558400c95