[clang] [flang] [llvm] [clang-tools-extra] [flang ]GETLOG runtime and extension implementation: get login username (PR #70917)

[Yi Wu via cfe-commits]

yi-wu-arm wrote:

Hi @klausler, thanks for the comment, I have changed the initial letters and add `const` to buffer in function declaration. Is there anything else I should pay attention to? Thanks in advance!

https://github.com/llvm/llvm-project/pull/70917