Merge pull request #222 from euanh/build-improvements

ocaml-re: Don't build a debuginfo package
specs: Don't build debuginfo subpackages for OCaml code

Debuginfo subpackages aren't actually built for OCaml packages,
but the Python RPM library thinks they will be built so makemake.py
produces build rules for them.   Since the targets of the rules are
never actually built, these packages may be rebuilt unnecessarily
during subsequent builds.

This follows the example given in the Fedora OCaml packaging guidelines:

   https://fedoraproject.org/wiki/Packaging:OCaml

Signed-off-by: Euan Harris <euan.harris@citrix.com>