[llvm] [SPIR-V] Support for C++ for OpenCL source language (PR #188791)

[Manuel Carrasco via llvm-commits]

mgcarrasco wrote:

> LGTM for me, but I would like to see approval from: @mgcarrasco as this patch slightly affects debug info translation and @svenvh as he understands OpenCL-specific metadata handling much better than I do

Thanks @MrSidims. Just to follow, based on the support that main currently has, this could have an impact on the `SPIRV::NonSemanticExtInst::DebugCompilationUnit` instruction when it comes to the language, right? I think the current implementation has support for setting the right language in this case. Do you refer to a different aspect of it? 

https://github.com/llvm/llvm-project/pull/188791