make installers: install required packages, first
make installers: install required packages, first

This change should fix a problem with the Mac OS X PPC build,
where the "libsqlite3" shared library needs to be installed
early. The same strategy is already used for Windows.

Merge to v6.0

mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket