[flang] [llvm] [Flang][FlangRT][Runtime] Add RT_OFFLOAD_API_GROUP_BEGIN to missing symbols on AMDGPU (PR #147612)

[via llvm-commits]

agozillon wrote:

> If I understand correctly, this is related to #145888 - can you please add a reference into the description?

I didn't actually notice this issue, I ran into the problem separately in some map tests I have! Thank you for pointing me to it, yes, I do believe this would fix that issue, at least the symbols referenced look similar, if it doesn't fix them all I'd be happy to create a subsequent PR to fix the rest. I'll alter the description just now to add the issue, thank you again :-)!

https://github.com/llvm/llvm-project/pull/147612