Merge branch 'SERVER-9987' into SERVER-9987-tmp
SERVER-9987 Include platform in RPM Release field

The "Release" rpm field has previous been 'mongodb_1' in all RPM's
but to support separate RHEL/CentOS 5.7+ and 6.2+ rpms, the release
will now be '1.el5' and '1.el6'.
Merge branch 'SERVER-9987' into SERVER-9987-tmp
Merge branch 'SERVER-9987-tmp' of github.com:ehershey/mongo into SERVER-9987-tmp