vkr: update venus-protocol for globalFencing

It is always false because venus requires per-context fencing.  However,
when it is true (in a private branch), it means

  virgl_renderer_create_fence
  virgl_renderer_poll
  virgl_renderer_export_fence
  (but not virgl_renderer_get_poll_fd)

works with venus.

Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
Reviewed-by: Yiwei Zhang <zzyiwei@chromium.org>

src/venus-protocol/vn_protocol_renderer.h

@@ -1,4 +1,4 @@
-/* This file is generated by venus-protocol git-335af8e9. */
+/* This file is generated by venus-protocol git-3854cba2. */
 
 /*
  * Copyright 2020 Google LLC

src/venus-protocol/vn_protocol_renderer_defines.h

@@ -318,6 +318,7 @@ typedef struct VkImportMemoryResourceInfoMESA {
 
 typedef struct VkVenusExperimentalFeatures100000MESA {
     VkBool32 memoryResourceAllocationSize;
+    VkBool32 globalFencing;
 } VkVenusExperimentalFeatures100000MESA;
 
 typedef struct VkMemoryResourceAllocationSizeProperties100000MESA {