Allow init to rm /dev/diag

Commit 312ae66ff40e4098e73248e4efcb24d00e04ed93
(AOSP cherrypick c05a522707bae794dd906f227a6b3b528451b701) ensures
that /dev/diag is always removed on boot on user builds. Allow for
it in SELinux policy.

Change-Id: Icfe707ea27c54f2961687b63c9722961cb3e6f79
2 files changed