[clang] [flang] [clang][driver] Fix -fveclib=ArmPL issue: with -nostdlib do not link against libm (PR #133578)

[Paul Osmialowski via cfe-commits]

pawosm-arm wrote:

Seriously, this is something CI people signaled to me. Our CI builds everything with `-fveclib=ArmPL` and one of the packages failed on unexpected linker behavior when libm was artificially added by `-fveclib=ArmPL` despite the `-nostdlib` flag being used. My suggestion to use `-fveclib=none` for that particular package has been promptly rejected (quite correctly though).


https://github.com/llvm/llvm-project/pull/133578