Package Kit: internationalize strings that may be displayed to the user

This fixes #14525.

Change-Id: I25810a4e12caed7aa47717e278591b1716b6198c
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2329
Reviewed-by: Niels Sascha Reedijk <niels.reedijk@gmail.com>

Fix build on Linux

Stub out some translation macros for host build, so the now localized
package solver can be built there.