Add build support for Windows x86 (x86_64 already built) and FreeBSD

[john-parton]

Here's the current supported architecture/os matrix.

	Linux	Windows 8 and Newer	FreeBSD 10 and Newer	macOS Snow Leopard (10.6)
x86	✅	❌	❌	⬜
x86_64	✅	✅	❌	✅
ppc64le	✅	⬜	❌	⬜
AArch64	✅	❌	❌	✅
ARMv7	✅	⬜	❌	⬜
s390x	✅	⬜	❌	⬜

Information about which architectures and operating systems Python supports

https://pythondev.readthedocs.io/platforms.html

Architectures

Well supported architectures:

• Intel x86 (32-bit) and x86_64 (64-bit, aka AMD64)

Best effort support architectures:

• ppc64le: should be well supported in practice
• AArch64
• ARMv7: should be well supported in practice
• s390x

Operating systems

• Linux
• Windows 8 and newer for Python 3.9
• FreeBSD 10 and newer
• macOS Snow Leopard (macOS 10.6, 2008) and newer