Selinux: Give runas permission to read system_data_file links am: 4481b885...

Selinux: Give runas permission to read system_data_file links am: 4481b885 am: 16efc04d am: e9354cda
am: a28ad688

Change-Id: Ib55ee766b488ce1b73f7fc6b04111ace0c5000ba

public/runas.te

@@ -14,6 +14,9 @@ allow runas shell_data_file:file { read write };
 allow runas system_data_file:file r_file_perms;
 allow runas system_data_file:lnk_file getattr;
 
+# The app's data dir may be accessed through a symlink.
+allow runas system_data_file:lnk_file read;
+
 # run-as checks and changes to the app data dir.
 dontaudit runas self:capability dac_override;
 allow runas app_data_file:dir { getattr search };