Set minimum build-essentials ver for RHEL

Versions of build-essentials < 2.0.2 don't seem to work on RHEL-based
operating systems. Build-essentials-2.0.2 has the required patch merged
(4d9f91c101588ab5292259fd06c1b50d935b7f73), so make that the minimum.
Ref: https://github.com/opscode-cookbooks/build-essential/pull/31

Signed-off-by: Scott Lovenberg <scott.lovenberg@gmail.com>