xdg: Introduce xdg_search_cache_dirs

policy/modules/system/xdg.if

@@ -63,6 +63,26 @@ interface(`xdg_data_content',`
 	userdom_user_home_content($1)
 ')
 
+########################################
+## <summary>
+##	Search through the xdg cache home directories
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+#
+interface(`xdg_search_cache_dirs',`
+	gen_require(`
+		type xdg_cache_t;
+	')
+
+	search_dirs_pattern($1, xdg_cache_t, xdg_cache_t)
+
+	userdom_search_user_home_dirs($1)
+')
+
 ########################################
 ## <summary>
 ##	Read the xdg cache home files