Vulkan: fix third_party path.

run_code_generation.py stopped working, likely as a result of the big Vulkan repo reorganization.
I fixed a path, regenerated everything (by temporarily hacking the script so it thought everything
was dirty), and nothing changed except one comment.

BUG=angleproject:2558

Change-Id: I5ac4c040ac1ec207098172303cc2f2507cccdecb
Reviewed-on: https://chromium-review.googlesource.com/1103281
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Tobin Ehlis <tobine@google.com>
diff --git a/scripts/run_code_generation.py b/scripts/run_code_generation.py
index ade4c4c..51fd073 100755
--- a/scripts/run_code_generation.py
+++ b/scripts/run_code_generation.py
@@ -168,7 +168,7 @@
     'Vulkan mandatory format support table': {
         'inputs': [
             'src/libANGLE/renderer/angle_format.py',
-            'third_party/vulkan-validation-layers/src/scripts/vk.xml',
+            'third_party/vulkan-headers/src/registry/vk.xml',
             'src/libANGLE/renderer/vulkan/vk_mandatory_format_support_data.json',
         ],
         'outputs': [