vulkan: Update header for KHR_get_surface_capabilities2

.. and new struct added to latest version of
KHR_shared_presentable_image.

Test: build
Change-Id: I653d0d8ad384c256e9a5c4cb79554360a5b2606e
diff --git a/vulkan/libvulkan/api_gen.h b/vulkan/libvulkan/api_gen.h
index 7f8d274..3e50fda 100644
--- a/vulkan/libvulkan/api_gen.h
+++ b/vulkan/libvulkan/api_gen.h
@@ -19,8 +19,8 @@
 #ifndef LIBVULKAN_API_GEN_H
 #define LIBVULKAN_API_GEN_H
 
-#include <bitset>
 #include <vulkan/vulkan.h>
+#include <bitset>
 #include "driver_gen.h"
 
 namespace vulkan {