files: Create files_map_usr_files interface

policy/modules/kernel/files.if

@@ -4838,6 +4838,25 @@ interface(`files_getattr_usr_files',`
 	getattr_files_pattern($1, usr_t, usr_t)
 ')
 
+########################################
+## <summary>
+##	Map generic files in /usr.
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+## <infoflow type="read" weight="10"/>
+#
+interface(`files_map_usr_files',`
+	gen_require(`
+		type usr_t;
+	')
+
+	allow $1 usr_t:file map;
+')
+
 ########################################
 ## <summary>
 ##	Read generic files in /usr.