vulkan: Fix vulkan.api for Ian's changes & regen

Various problems: uint32_t vs u32, a dropped }, function body with
semantics that crash the generator, etc ...

V2: don't export Ian's extensions from libvulkan.

Change-Id: I1dceb4d4fc21ad5d38255c4979d9ef372ea2a28b
Test: build
diff --git a/vulkan/libvulkan/driver_gen.h b/vulkan/libvulkan/driver_gen.h
index 167f88c..fa81958 100644
--- a/vulkan/libvulkan/driver_gen.h
+++ b/vulkan/libvulkan/driver_gen.h
@@ -36,6 +36,7 @@
         ANDROID_native_buffer,
         EXT_debug_report,
         KHR_android_surface,
+        KHR_incremental_present,
         KHR_surface,
         KHR_swapchain,
         GOOGLE_display_timing,