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

[Tomohiro Kashiwada via cfe-commits]

kikairoya wrote:

Thank you for the update.

Please keep the commit history rather than squashing manually, that makes reviewing the changes harder.
Squashing is always done by GitHub, obtaining the commit message from the description text and gathering co-authors from stacked commits (I have never done it since I don't have the commit access, though).
See https://llvm.org/docs/GitHub.html#updating-pull-requests and the following sections.

I would appreciate it if you would restore the history from your local reflog that pointing just before squashing.

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