[arch-general] Add gdbm and db to [multilib]?

[Dylan Cali]

Hey guys,

The [core] packages gdbm and db are not also available in [multilib].  This
has the side effect, for example, of not being able to create a 32bit Perl
using perlbrew.

There are versions available in the AUR (which are orphaned and need to be
updated), but instead of updating the AUR versions does it instead make
sense to bring these into the official [multilib], as they're fairly core
libraries?

Thanks,
Dylan