libvulkan: update code gen templates

Update code-generator.tmpl to match the result from doing `$ apic
template ../api/vulkan.api code-generator.tmpl`.
Update null_driver.tmpl to match the result from doing `$ apic template
../api/vulkan.api null_driver.tmpl`.

Test: build
Change-Id: Idcf6c148fd0d49bb1b6a31e657e82970f52923c0
diff --git a/vulkan/libvulkan/api_gen.cpp b/vulkan/libvulkan/api_gen.cpp
index df86af0..ad46c3b 100644
--- a/vulkan/libvulkan/api_gen.cpp
+++ b/vulkan/libvulkan/api_gen.cpp
@@ -16,12 +16,11 @@
 
 // WARNING: This file is generated. See ../README.md for instructions.
 
+#include <log/log.h>
 #include <string.h>
 
 #include <algorithm>
 
-#include <log/log.h>
-
 // to catch mismatches between vulkan.h and this file
 #undef VK_NO_PROTOTYPES
 #include "api.h"