Allow system settings to read /proc/version

am: c975bd90

Change-Id: I576189108f7863076070734b958385d1cd545c5b

private/system_app.te

@@ -92,7 +92,10 @@ allow system_app keystore:keystore_key {
 r_dir_file(system_app, sysfs_type)
 
 # settings app reads /proc/version and /proc/pagetypeinfo
-allow system_app proc:file r_file_perms;
+allow system_app {
+  proc
+  proc_version
+}:file r_file_perms;
 
 control_logd(system_app)
 read_runtime_log_tags(system_app)