Merge branch 'master' into core-updates

build: Update PO files as per 'make dist'.

nls: Update eo, pt_BR, sr, and vi package translations.

nls: Remove obsolete messages from PO files.

Suggested by Benno Schulenberg <coordinator@translationproject.org>.

* po/guix/eo.po, po/guix/pt_BR.po, po/guix/sr.po, po/guix/vi.po,
  po/packages/eo.po, po/packages/pt_BR.po, po/packages/sr.po,
  po/packages/vi.po: Remove obsolete messages.

Merge branch 'master' into core-updates

i18n: Move package descriptions from 'guix' to 'guix-packages'.

* po/guix: Merge with po/packages as per
  <https://lists.gnu.org/archive/html/guix-devel/2014-06/msg00058.html>.
* po/packages/LINGUAS: Add eo, pt_BR, sr, and vi.