Cygwin: Apply patches from downstream CMake package

Factored out of cmake/cmake!5092 (merged).

Based on downstream patches from Cygwin package for CMake by Marco Atzeri.

Do: stage

mentioned in merge request cmake/cmake!5092 (merged)

Do: merge

merged

mentioned in commit 185dd56e

mentioned in merge request cmake/cmake!5104 (merged)

Thank you!

And if it is possible, please, would you mention the original contributor Marco Atzeri in a commit message for the main CMake repository?

The commit messages mention that. I just edited the MR description to include similar text.

changed the description