As notified on IRC #gentoo-catalyst, here is my patch for propagating
the 'verbose' option from catalyst through to the genkernel build and
resulting emerge callback (in installcd-stage2).

Tested OK this end (fixed a minor typo in genkernel parameter) ready for
review. I can raise a PR, but here is the 'git format-patch' version for
consideration.

Best regards,

Michael Everitt.