Because manylinux2014's compiler encounters errors with the upstream piolib,
I took the easy way out and copied the files in and edited them. (They were
also reformatted by clang-format, sigh)
Tested in a partially 32-bit, partially 64-bit raspbian os install with a
32-bit python executable (arm-linux-gnueabihf). This required the `kernel=kernel8.img`
line in /boot/firmware/config.txt.
