gsyncd / geo-rep: handle ENOENT during readlink()

Change-Id: I8611122fda63ea496ad4491473ecabe96bf19cfa
BUG: 1003803
Signed-off-by: Venky Shankar <vshankar@redhat.com>
Reviewed-by: Amar Tumballi <amarts@redhat.com>
Tested-by: Amar Tumballi <amarts@redhat.com>
Reviewed-on: http://review.gluster.org/5756
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Avra Sengupta <asengupt@redhat.com>
Tested-by: Avra Sengupta <asengupt@redhat.com>
Reviewed-by: Anand Avati <avati@redhat.com>