build: GH316 include cinttypes instead of inttypes.h

Fixes compilation problems on CentOS.

Change-Id: I92c5ea0ebea8684c40e67e9b386732e55cb47cc8
diff --git a/vk-layer-generate.py b/vk-layer-generate.py
index 1705d73..66e0017 100755
--- a/vk-layer-generate.py
+++ b/vk-layer-generate.py
@@ -715,7 +715,7 @@
         header_txt.append('#include <stdio.h>')
         header_txt.append('#include <stdlib.h>')
         header_txt.append('#include <string.h>')
-        header_txt.append('#include <inttypes.h>')
+        header_txt.append('#include <cinttypes>')
         header_txt.append('')
         header_txt.append('#include <unordered_map>')
         header_txt.append('')