Add SELinux restorecon calls on ASEC containers.

This will allow fine-grained labeling of the
contents of ASEC containers. Some of the contents
need to be world readable and thus should be
distinguishable in policy.

Change-Id: Iefee74214d664acd262edecbb4f981d633ff96ce
Signed-off-by: rpcraig <rpcraig@tycho.ncsc.mil>