Bug 207674 Use about:logo for about:

r=caillon sr=jag

xpfe/global/resources/locale/en-US/about.xhtml

@@ -68,7 +68,7 @@ h1 {
 
 <td>
 <a href="&vendorURL;">
-<img src="chrome://global/content/logo.gif" alt="&brandShortName;" width="200" height="200" /></a>
+<img src="about:logo" alt="&brandShortName;" width="200" height="200" /></a>
 </td>
 
 <td id="mozver">