[clang] [flang] [clang][driver] Special care for -l flags in config files (PR #117573)

[Sam James via cfe-commits]

thesamesam wrote:

I thought I recognised your name from somewhere ;)

Apparently I completely forgot about https://github.com/llvm/llvm-project/issues/67209 too.

https://github.com/llvm/llvm-project/pull/117573