This is in order to clarify that this is not the "official" htop,
but a fork based on an older version, and that has since diverged.
- Enable build on 64 bits.
- Drop "-x86" suffix on 32 bits binary.
- Make it CONFLICT with "htop", effectively replacing it at install,
and just in case we get a recipe for the "official" htop.
(might just rename the provided `cmd:htop` instead in that case).
