Trigger a policy reload from post-fs-data.

Once userdata is available and decrypted, trigger a policy reload to pick
up any policy update files stored under /data/security.

Change-Id: Ic2b3121c3395429b108c40d1d7f5a3124a5896c5
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>

rootdir/init.rc

@@ -245,6 +245,9 @@ on post-fs-data
     # Separate location for storing security policy files on data
     mkdir /data/security 0711 system system
 
+    # Reload policy from /data/security if present.
+    setprop selinux.reload_policy 1
+
     # If there is no fs-post-data action in the init.<device>.rc file, you
     # must uncomment this line, otherwise encrypted filesystems
     # won't work.