[clang] [flang] [Flang] LoongArch64 support for BIND(C) derived types in mabi=lp64d. (PR #117108)

[Tom Eccles via cfe-commits]

https://github.com/tblah approved this pull request.

The code changes look good to me. I am not at all familiar with LoongArch64 so it would be best if somebody else reviews that this implements the ABI correctly.

https://github.com/llvm/llvm-project/pull/117108