[clang] [Clang][Driver] Revise Cygwin ToolChain to call linker directly (PR #147960)

[Tomohiro Kashiwada via cfe-commits]

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kikairoya wrote:

IIRC this predicate has been removed. Have you tested it with the current trunk, after rebasing?

https://github.com/llvm/llvm-project/pull/147960