Namecoin: Rebrand git-utils
Namecoin: Rebrand git-utils

This enables properly stripping the "nc" prefix from Guix-built
binaries.

namecoin/namecore,pataquets/namecoin-core,namecoin/namecoin-core,namecoin/namecoin-core,pataquets/namecoin-core,namecoin/namecore,namecoin/namecoin-core,namecoin/namecoin-core,pataquets/namecoin-core,namecoin/namecoin-core,pataquets/namecoin-core,namecoin/namecore,pataquets/namecoin-core,namecoin/namecoin-core,pataquets/namecoin-core,namecoin/namecore,namecoin/namecore,namecoin/namecore