migration: Update error message (autotest#6398)

Signed-off-by: lcheng <lcheng@redhat.com>

Author: cliping

libvirt/tests/cfg/migration/destructive_operations_around_live_migration/kill_qemu_during_performphase.cfg

@@ -47,7 +47,7 @@
             expected_dest_state = "nonexist"
             expected_src_state = "running"
             migrate_speed = "1"
-            err_msg = "QEMU unexpectedly closed the monitor|Unable to read from socket: Connection reset by peer"
+            err_msg = "QEMU unexpectedly closed the monitor|Unable to read from socket: Connection reset by peer|Channel error: Input/output error"
             check_disk_on_dest = "no"
             virsh_migrate_extra = "--bandwidth 1000"
         - kill_dest_qemu_after_vm_paused:
@@ -58,7 +58,7 @@
             expected_dest_state = "nonexist"
             expected_src_state = "running"
             virsh_migrate_extra = "--timeout 2 --timeout-suspend --bandwidth 1000"
-            err_msg = "QEMU unexpectedly closed the monitor|Unable to read from socket: Connection reset by peer"
+            err_msg = "QEMU unexpectedly closed the monitor|Unable to read from socket: Connection reset by peer|Channel error: Input/output error"
         - kill_src_qemu:
             expected_dest_state = "nonexist"
             expected_src_state = "shut off"