[ITA] binutils, mingw64-{i686,x86_64}-binutils

[Achim Gratz]

I have finally figured out why building binutils (whatever version)
didn't work correctly with gcc-10, so I was able to build  the current
release version of binutils 2.35.1 finally (and re-build the same
binutils version with itself).  Enabling to move libbfd/libopcodes into
shared libraries has been prepared, but so far I have not been able to
build binutils that actually work (already the tests are failing).

The updated cygport file (and patches, albeit non-active for the actual
configuration) is available on the playground branch:

https://cygwin.com/git-cygwin-packages/?p=git/cygwin-packages/binutils.git;a=shortlog;h=refs/heads/playground

The build results on the CI:

https://ci.appveyor.com/project/cygwin/scallywag/builds/37184120


I have not yet started to work on the mingw64 packages.


Regards,
Achim.
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