[PATCH 0/2] MR569: tests/shader_runer: Support SRV buffers.

[Francisco Casas (＠fcasas)]

This allows to declare SRV buffers in the shader tests using `[buffer srv n]` blocks, and passing them to the different backends.

Also, 1/2 includes a missing bit required to parse `Buffer<>` types in the HLSL compiler.

This is a step towards supporting StructuredBuffer types in further patches.