Stable for ppc64, wrt bug #519022

(Portage version: 2.2.8-r1/cvs/Linux x86_64, RepoMan options: --include-arches="ppc64", signed Manifest commit with key 7194459F)
version bump

(Portage version: 2.2.10/cvs/Linux x86_64, signed Manifest commit with key E73C35B3)
Restore keywords.

(Portage version: 2.2.12/cvs/Linux x86_64, signed Manifest commit with key A792A613)
Version bump to 4.2.6 fixes bug#520282.

(Portage version: 2.2.8-r1/cvs/Linux x86_64, signed Manifest commit with key 8EEE3BE8)