Bumping gaia.json for 1 gaia-central revision(s) a=gaia-bump
Truncated some number of revisions since the previous bump.

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https://hg.mozilla.org/integration/gaia-central/rev/5190754cf8d1
Author: Corey Frang <gnarf37@gmail.com>
Desc: Bug 916293 - [Clock]: Changes to nRemainHours need ID change to get picked up by l10n - r=jugglinmike

- Rename `nRemainHours` to `nAndRemainHours` so the l10n process can pick up the new string
- Remove old `nRemainHours` translations
- Add more unit tests to the render method to ensure all localization strings are properly used