qemu_agent|monitor: use different log on hangup event

Both qemu monitor and agent print the same
log on HUANGUP event, which would be confusing
when reading libvirtd log.

This patch will give a different log message to them.
Signed-off-by: NChen Hanxiao <chenhanxiao@gmail.com>
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>

src/qemu/qemu_agent.c

@@ -633,7 +633,7 @@ qemuAgentIO(int watch, int fd, int events, void *opaque)
         if (!error &&
             events & VIR_EVENT_HANDLE_HANGUP) {
             virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
-                           _("End of file from monitor"));
+                           _("End of file from agent monitor"));
             eof = true;
             events &= ~VIR_EVENT_HANDLE_HANGUP;
         }

src/qemu/qemu_monitor.c

@@ -692,7 +692,7 @@ qemuMonitorIO(int watch, int fd, int events, void *opaque)
             hangup = true;
             if (!error) {
                 virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
-                               _("End of file from monitor"));
+                               _("End of file from qemu monitor"));
                 eof = true;
                 events &= ~VIR_EVENT_HANDLE_HANGUP;
             }