[bug#45573] [PATCH] Correct freecad runtime errors

[Ekaitz Zarraga]

Hi,

I attach 4 patches that correct the runtime issues freecad has and also supply 
some packages needed as a dependency.

Freecad is a very complex package that is hard to build because many of its 
dependencies' buildsystem is broken. The approach followed here is the same 
that Nix follows and appears to work correctly.

The changes correct the Draft module, which wasn't available because pivy was 
not added as a dependency.

For context, see this message:
https://lists.gnu.org/archive/html/guix-devel/2020-12/msg00123.html

Thanks

0001-gnu-Add-coin3D-4.patch
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0003-gnu-Add-python-pivy.patch
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0004-gnu-freecad-correct-runtime-errors.patch
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0002-gnu-Add-soqt.patch
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