Filename of a 16x16 badge icon to show in the Build History.
Enter a path starting with /userContent for a custom image
in the $HUDSON_HOME/userContent directory (such as
/userContent/mybadge.gif); upload files into this directory
using the form below. Enter a plain filename for a file in either
$HUDSON_HOME/plugins/promoted-builds-simple/images (plugin
includes ga.gif, qa.gif and qa-green.gif) or in
Jenkins' images/16x16 directory (such as star-gold.gif).