libxl: libxl_domain_create_restore has an extra argument

In the latest libxenlight code, libxl_domain_create_restore accepts a
new argument. Update libvirt's libxl driver for that. Use the macro
provided by libxenlight to detect which version should be used.

The new parameter (send_back_fd) is set to -1 because libvirt provides
no such fd.
Signed-off-by: NWei Liu <wei.liu2@citrix.com>
Message-id: 1459866012-27081-1-git-send-email-wei.liu2@citrix.com

src/libxl/libxl_domain.c

@@ -1070,7 +1070,12 @@ libxlDomainStart(libxlDriverPrivatePtr driver, virDomainObjPtr vm,
         ret = libxl_domain_create_new(cfg->ctx, &d_config,
                                       &domid, NULL, &aop_console_how);
     } else {
-#ifdef LIBXL_HAVE_DOMAIN_CREATE_RESTORE_PARAMS
+#if defined(LIBXL_HAVE_DOMAIN_CREATE_RESTORE_SEND_BACK_FD)
+        params.checkpointed_stream = 0;
+        ret = libxl_domain_create_restore(cfg->ctx, &d_config, &domid,
+                                          restore_fd, -1, &params, NULL,
+                                          &aop_console_how);
+#elif defined(LIBXL_HAVE_DOMAIN_CREATE_RESTORE_PARAMS)
         params.checkpointed_stream = 0;
         ret = libxl_domain_create_restore(cfg->ctx, &d_config, &domid,
                                           restore_fd, &params, NULL,