cregistry: Build 'all' as a dependency of 'test'
cregistry: Build 'all' as a dependency of 'test'

cregistry.a is a dependency needed by other modules. Although the test
target is empty, we need to build it to ensure running 'make test'
always works.

Closes: https://trac.macports.org/ticket/56623

danchr/macports-base,neverpanic/macports-base,macports/macports-base,neverpanic/macports-base,macports/macports-base,danchr/macports-base