qemu_driver: Fix comment of qemuStateCleanup()

The comment says that the function kills domains and networks.
This is obviously not the case.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>

src/qemu/qemu_driver.c

@@ -1154,7 +1154,7 @@ qemuStateStop(void)
 /**
  * qemuStateCleanup:
  *
- * Shutdown the QEMU daemon, it will stop all active domains and networks
+ * Release resources allocated by QEMU driver (no domain is shut off though)
  */
 static int
 qemuStateCleanup(void)