[lld] [LLD] [MinGW] Recognize the -rpath option (PR #102886)

[Fangrui Song via llvm-commits]

MaskRay wrote:

Frankly I wish that we do not add the workaround like this (especially for "dangerous" options like `-rpath`, whose ignoring in ELF could be very wrong). However, I don't know the MinGW ecosystem well. If you think this is the right thing to retain a workaround forever, LGTM.

https://github.com/llvm/llvm-project/pull/102886