Update some missing files to libX11 1.3.4

nx-X11/lib/X11/XKBlibint.h

@@ -295,7 +295,7 @@ extern char	*_XkbGetCharset(
 );
 
 extern int	 _XkbGetConverters(
-    char *		/* encoding_name */,
+    const char *       /* encoding_name */,
     XkbConverters *    /* cvt_rtrn */
 );