Use our own checked in Vulkan header to build skia source code.

Core Skia will always include our own SkiaVulkan.h which basically just
includes vulkan_core.h. All platform vulkan specific stuff must be
include by the client in their own vulkan.h file. Our public interface
is set up that we only use vulkan objects that will be present in all
versions of vulkan headers that the client could include.

Bug: skia:
Change-Id: I6673fd91498eabcc923d65d20f2b5e0a89b4ccf6
Reviewed-on: https://skia-review.googlesource.com/142985
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
10 files changed