release: split up Oracle Cloudware tools

Sometimes one or the other but not both tools are present; this ensures
that all cases are correctly handled.

Reported by: cperciva
Approved by: cperciva (re)
Sponsored by: SkunkWerks, GmbH

Reviewed by: cperciva
Differential Revision: https://reviews.freebsd.org/D53186

MFC after: 2 days

(cherry picked from commit 81d807a90611a4980cae843b404d99c27edc1893)