The nixpkgs-unstable channel's programs.sqlite was used to identify
packages producing exactly one binary, and these automatically added
to their package definitions wherever possible.
This commit adds the pcimem tool.
pcimem is a simple method of reading and writing to memory registers on a PCI card.
Compared to pkgs.devmem2, it does not work on the total memory space
of the machine but restricts access to just one PCI resource.