bug#74805: 30.0.92; Trying to build scratch/igc on Cygwin

[Ken Brown]

I've made a first attempt to port mps to Cygwin.  If anyone else is
interested in seeing this or helping, you can find my work at

  https://github.com/kbrow1i/mps-cygwin

This is a fork of the mps git repo with two commits on top.

With the current attempt, I can build the scratch/igc branch, but there
are many test failures.  For example, when I run the process-tests, I
get 19 failures and 8 skipped tests.  But on the master branch I get no
failures and only 3 skipped.

This probably means that my current attempt to port mps is no good, and
I have to go back to the drawing board.  Before I do that, however, I'd
like to check and see if test failures on scratch/igc are to be
expected.  Are people testing other platforms seeing this too?

Thanks.

Ken