sk-unix: Print the name of sockets being dropped

Useful for bug hunting.

 | (00.005209) unix: Dropping path /mnt/disk1/new_subvol/criu/test/zdtm/live/static/sockets00.test
 | for unlinked bound sk 0x26.0x1d4e real 0x23.0x1d4e
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

sk-unix.c

@@ -356,9 +356,10 @@ static int unix_collect_one(const struct unix_diag_msg *m,
 
 			if ((st.st_ino != uv->udiag_vfs_ino) ||
 			    (st.st_dev != kdev_to_odev(uv->udiag_vfs_dev))) {
-				pr_info("unix: Dropping path for "
+				pr_info("unix: Dropping path %s for "
 						"unlinked bound "
 						"sk %#x.%#x real %#x.%#x\n",
+						name,
 						(int)st.st_dev,
 						(int)st.st_ino,
 						(int)uv->udiag_vfs_dev,