KWSys 2021-05-07 (979d7db0)

Code extracted from:

    https://gitlab.kitware.com/utils/kwsys.git

at commit 979d7db0d534b25cc41f5defdc121dce0f9da10b (master).

Upstream Shortlog
-----------------

Ali Mohammad Pur (1):
      1ea48581 ProcessUNIX: Fix kwsysProcessesSignalHandler() if !KWSYSPE_USE_SIGINFO

Brad King (1):
      8f3c4879 Status: Fix GetWindows return type

Georg Schwab (2):
      fd2ec23d SystemTools: Implement FileIsSymlink using canonical reparse structure
      3683e5ab SystemTools: Implement CreateSymlink and ReadSymlink on Windows