This change adds the logic to recognise the OpenCL.DebugInfo.100 extension and handle its instructions, but does not do anything with them (yet).

The actual handling of these instructions comes in a later change.

Bug: b/145351270
Change-Id: I8d68d583e1588d62e6c68fcc4365161fddf83509
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/40131Tested-by: Ben Clayton <bclayton@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>