pacrepairdb: handle cache packages with no arch
pacrepairdb: handle cache packages with no arch

Packages are not required to provide an architecture, in which case they
are treated as "any".

Signed-off-by: Andrew Gregory <13115e38efea9b5bf08524f6765f5bb44291d47f@gmail.com>

andrewgregory/pacutils,andrewgregory/pacutils