Revert "Build fix: xdrgen"

This reverts commit 12bc39c144aa41a097435f2aab304ddfbbb9b625

This causes all regression tests to fail. Reverting for now, we can include a
correct fix later.

Change-Id: I3c8966288f66d0eafa2e94490e3b64a057b4f2c0
URL: http://supercolony.gluster.org/pipermail/gluster-devel/2014-November/042759.html
BUG: 1157839
Reported-by: Emmanuel Dreyfus <manu@netbsd.org>
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Reviewed-on: http://review.gluster.org/9040
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>