Don't cache ocaml packages
Don't cache ocaml packages

We should never need the sources for OCaml packages, so don't cache
them.

Signed-off-by: Christian Lindig <4f88b50bc9dba63c9a7d9e208d4b3ac6f1a52800@citrix.com>

lindig/xs-opam,xapi-project/xs-opam