Extract upstream KWSys using the following shell commands.

$ git archive --prefix=upstream-kwsys/ 9596e98d | tar x
$ git shortlog --no-merges --abbrev=8 --format='%h %s' a7e5360f..9596e98d
Dmitry Marakasov (1):
      b86a2a3e Process: Fix off-by-one when adding two times

Marek Vasut (1):
      ddfa8019 CPU: Add NIOS2 support

Rolf Eike Beer (2):
      0adafb51 SystemTools: use FindProgram() overload that checks for directory
      9596e98d SystemTools: move some code around that is used only on Windows-like platforms