Bug#843868: ocamlbuild: invalid build-dependency: ocaml-best-compilers

[Riku Voipio]

Package: ocamlbuild
Version: 0.9.3-3
Severity: grave
Tags: experimental

ocamlbuild is failing to build since ocaml-best-compilers is a virtual package:

https://buildd.debian.org/status/package.php?p=ocamlbuild&suite=experimental