Revert "Revert "SELinux policy changes for re-execing init.""

This reverts commit c450759e8e67caa7a77ca078b1478b018a9b848b.

There was nothing wrong with this change originally --- the companion
change in init was broken.

Bug: http://b/19702273
Change-Id: I9d806f6ac251734a61aa90c0741bec7118ea0387
4 files changed