files: add files_watch_etc_symlinks interface

Signed-off-by: bauen1 <j2468h@gmail.com>

policy/modules/kernel/files.if

@@ -3200,6 +3200,24 @@ interface(`files_read_etc_symlinks',`
 	read_lnk_files_pattern($1, etc_t, etc_t)
 ')
 
+########################################
+## <summary>
+##	Watch /etc symlinks
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+#
+interface(`files_watch_etc_symlinks', `
+	gen_require(`
+		type etc_t;
+	')
+
+	allow $1 etc_t:lnk_file watch;
+')
+
 ########################################
 ## <summary>
 ##	Create, read, write, and delete symbolic links in /etc.