lld/ELF: Make three rarely-used flags work with --reproduce

All three use readFile() for their argument so their argument file is
already copied to the tar, but we weren't rewriting the argument to
point to the path used in the tar file.

No test because the change is trivial (several other flags in
createResponseFile() also aren't tested, likely for the same reason.)

Differential Revision: https://reviews.llvm.org/D92356