Subject: attribution of gitmerge.el merged entries in generated ChangeLog

From: Glenn Morris <[email-masked]>
Date: Tue, 02 Jun 2015 02:22:10 -0400

Package: emacs
Version: 25.0.50

After using M-x gitmerge (which seems v nice, BTW), 'make ChangeLog'
creates a file with contents:

2015-06-01  Glenn Morris  <rgm@...>

   Merge from origin/emacs-24
   8b5f2f4 * doc/emacs/emacs.texi: Update the ISBN of the Emacs manual.

The merged entries should be listed under the name of the original
author(s), not the name of the person who did the merge.