Update due to renaming of macemacs_*.png to emacs*_mac.png.

etc/NEWS

@@ -55,7 +55,7 @@ testing for the `multi-tty' feature.
 OS-X-style icons (an application icon and a relevant document icon)
 were contributed by Kentaro Ohkouchi.
 Source files for these icons can be found in Emacs.app/Contents/Resources.
-PNG versions are available as etc/images/icons/macemacs_*.png.
+PNG versions are available as etc/images/icons/emacs*_mac.png.
 
 ** Built-in functions (subr) can now have an interactive specification
 that is not a prompt string.  If the `intspec' parameter of a `DEFUN'