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

[Sam James via cfe-commits]

thesamesam wrote:

@pawosm-arm See also https://wiki.gentoo.org/wiki/Project:Quality_Assurance/As-needed#Importance_of_linking_order. It is common for distributions to enable `-Wl,--as-needed` via patches to the compiler or configuration files.

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