Allow system_server to set ctl.bugreport property.

Resolves denials such as:
avc:  denied  { set } for property=ctl.bugreport scontext=u:r:system_server:s0 tcontext=u:object_r:ctl_bugreport_prop:s0 tclass=property_service

Change-Id: I6c3085065157f418fc0cd4d01fa178eecfe334ad
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>

system_server.te

@@ -194,6 +194,7 @@ allow system_server powerctl_prop:property_service set;
 
 # ctl interface
 allow system_server ctl_default_prop:property_service set;
+allow system_server ctl_bugreport_prop:property_service set;
 
 # Create a socket for receiving info from wpa.
 type_transition system_server wifi_data_file:sock_file system_wpa_socket;