lang/ocaml-nox11 port produces a package with the exact same name as
lang/ocaml because they have a common Makefile. However, by defining the
SFX variable before including it, ocaml-nox11 package name will receive
a suffix. This fixes an origin conflict seen on poudriere.
The new base package name will be ocaml-nox11
Approved by: bapt/culot (mentors, implicit), maintainer timeout