Localization/L10n conversion status

Legend
l10n_* cand -- candidate for using l10n* flags, i.e. used in SRC_URI, *DEPEND, or directly by ebuild (but not to set LINGUAS)

LINGUAS cand -- uses linguas* to set LINGUAS for the build system

Statuses:
 * No|TODO -- need to figure out what to do with the package,
 * 1) Partial|In progress -- bug reported, waiting for commit,
 * 2) Yes|DONE -- necessary l10n* changes committed / no changes needed.

Workflow

 * 1) If package uses linguas*, add it with TODO state.
 * 2) Figure out why package uses linguas*:
 * 3) * if it uses it purely to set LINGUAS for the ebuild system, mark LINGUAS cand and DONE,
 * 4) * if it uses it purely for other purposes, mark l10n* cand and see below,
 * 5) * if it uses it both for other purposes and to set LINGUAS, mark both and see below.
 * 6) If you filed a bug, mark In progress and add the bug reference to notes.
 * 7) If you committed the change to all versions, mark DONE.

How to update ebuilds
If ebuild is l10n* candidate only, i.e. uses linguas* to control downloading stuff, deps, installing stuff outside of LINGUAS build system etc., just replace linguas* flags with l10n* flags.

If ebuild uses linguas* only to control value of LINGUAS, leave the flags as-is and update the status. We'll be dropping explicit linguas* later in a single commit.

If ebuild does both, copy appropriate linguas* to l10n*, and update appropriate parts of ebuild. Leave linguas* in place to control LINGUAS. We'll drop the extra linguas* part in one commit later.