Move vulkan headers from third_party to include/third_party.

Bug: skia:
Change-Id: I7174c6da075c0fd3d6238a5556439f42d6b97659
Reviewed-on: https://skia-review.googlesource.com/c/176680
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
diff --git a/tools/check-headers-self-sufficient b/tools/check-headers-self-sufficient
index 59c4d79..fe8a8ac 100755
--- a/tools/check-headers-self-sufficient
+++ b/tools/check-headers-self-sufficient
@@ -30,10 +30,10 @@
     '-Iinclude/ports',
     '-Iinclude/private',
     '-Iinclude/svg',
+    '-Iinclude/third_party/vulkan',
     '-Iinclude/utils',
     '-Iinclude/utils/mac',
     '-Iinclude/views',
-    '-Ithird_party/vulkan',
 ]
 
 all_header_args = [
@@ -49,6 +49,7 @@
     '-Iinclude/ports',
     '-Iinclude/private',
     '-Iinclude/svg',
+    '-Iinclude/third_party/vulkan',
     '-Iinclude/utils',
     '-Iinclude/utils/mac',
     '-Iinclude/views',
@@ -82,7 +83,6 @@
     '-Ithird_party/externals/sfntly/cpp/src',
     '-Ithird_party/externals/zlib',
     '-Ithird_party/gif',
-    '-Ithird_party/vulkan',
 ]
 
 ignore = [