fuse: log options passed to fuse when mount fails

This is done to ease debugging.

Change-Id: I50cfca297e03f41cc47819d0700752e3d24a07d6
BUG: 852754
Signed-off-by: Lubomir Rintel <lubo.rintel@gooddata.com>
Reviewed-on: http://review.gluster.org/3877
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>

contrib/fuse-lib/mount.c

@@ -294,7 +294,8 @@ gf_fuse_mount (const char *mountpoint, char *fsname,
                 }
 
                 if (ret == -1)
-                        GFFUSE_LOGERR ("mount failed");
+                        GFFUSE_LOGERR ("mount of %s to %s (%s) failed",
+                                       fsname, mountpoint, mnt_param);
 
                 if (status_fd >= 0)
                         (void)write (status_fd, &ret, sizeof (ret));