MVKShaderConverterTool add support to output SPIR-V as header (.h) files.
Add MVKShaderConverterTool Xcode target.
Add MVKShaderConverterTool Package Xcode scheme.
fetchDependencies builds MVKShaderConverterTool and runs
it on shader files in VulkanSamples API-Samples directory.
Fix OOM conditions with multiple consecutive two-vector OpVectorShuffles.
Support non-square row-major matrix conversions.
Add ability to write SPIR-V to file for debugging purposes.
Update ThirdPartyConfig.md to latest use of SPIRV-Cross testability.
Update to latest SPIRV-Cross version.