This cygwin patch is now required as both static and shared versions
of libparrot being built (which they weren't when I first wrote the
patch which went in last night).
Strangely, cygwin ld prefers to link with libparrot.a in preference to
libparrot.dll, so I'm setting the has_static_linking=>0, and also
updated the PLATFORMS file.
We're as a pretty good point to close #37303, #36836 and #36540.
Cheers,
Nick
Almost - r10985 will be in 0.4.1
leo