allow system_app to connect to time daemon

Maybe fixes bug 17330664. Addresses the following denial:

<12>[  382.085582] type=1400 audit(1409337359.908:229): avc: denied { connectto } for pid=6345 comm="omm.timeservice" path=0074696D655F67656E6F6666 scontext=u:r:system_app:s0 tcontext=u:r:time:s0 tclass=unix_stream_socket permissive=0

Bug: 17330664
Change-Id: Iac03b1b25e4f6eb473ee392c1d269c9fc3e46a08
diff --git a/sepolicy/system_app.te b/sepolicy/system_app.te
index 96ffe60..53b4de4 100644
--- a/sepolicy/system_app.te
+++ b/sepolicy/system_app.te
@@ -1,2 +1,4 @@
 # TODO b/17015082
-allow system_app shell_data_file:dir search;
\ No newline at end of file
+allow system_app shell_data_file:dir search;
+
+allow system_app time:unix_stream_socket connectto;