Proper security labeling of multi-user data directories.

This patch covers 2 cases. When an app is installed
and the resulting data directory is created for all
existing users. And when a new user is created and
all existing app data directories are created for
the new user.

Signed-off-by: rpcraig <rpcraig@tycho.ncsc.mil>

Change-Id: I01f2a9084dfe7886087b1497070b0d7f2ad8478e