Build makedepend so openssl's build can use it.
Add pkg-config that is needed by makedepend.
Remove -R from Ruby config and add -Qunused-arguments to make autoconf not treat anything in stderr as a failure.
Document why -Qunused-arguments is required.
Merge pull request #139 from opscode/build-makedepend

Build makedepend so openssl's build can use it.