gfxstream: import Vulkan-docs from 463f8c

This is based on 463f8c ("Change log for October
20, 2023 Vulkan 1.3.269 spec update").

Right now, the current version of vulkan-docs seems to
be 2021.  Need to update.  Import here without
modifications so we can track the changes that were
needed to support cereal.

BUG=310206667
TEST=launch_cvd --gpu_mode=gfxstream_guest_angle

Change-Id: Id2546d237cae00ed7d6731b67cd1a194f88c69ef
diff --git a/codegen/vulkan/vulkan-docs-next/makeAllExts b/codegen/vulkan/vulkan-docs-next/makeAllExts
new file mode 100755
index 0000000..1dd4808
--- /dev/null
+++ b/codegen/vulkan/vulkan-docs-next/makeAllExts
@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+#
+# Copyright 2016-2023 The Khronos Group Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+# makeAllExts - invoke Makefile with the right options to build with all
+# extensions included.
+
+./makeSpec -clean -spec all $*