[PATCH] D101224: [lld-macho] Have --reproduce account for path rerooting

[Jez Ng via Phabricator via llvm-commits]

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We need to account for path rerooting when generating the response
file. We could either reroot the paths before generating the file, or pass
through the original filenames and change just the syslibroot. I've opted for
the latter, in order that the reproduction run more closely mirrors the
original.

We must also be careful *not* to make an absolute path relative if it is
shadowed by a rerooted path. See repro6.tar in reroot-path.s for
details.

I've moved the call to `createResponseFile()` after the initialization of
`config->systemLibraryRoots`, since it now needs to know what those roots are.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D101224

Files:
  lld/MachO/Driver.cpp
  lld/MachO/Driver.h
  lld/MachO/DriverUtils.cpp
  lld/test/MachO/reroot-path.s

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