Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/d5faac7a06e5
Author: Staś Małolepszy <stas@mozilla.com>
Desc: Merge pull request #19651 from stasm/1013175-l10nerror

Bug 1013175 - Descriptive error messages in l10n.js. r=gandalf

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https://hg.mozilla.org/integration/gaia-central/rev/1d3b804b2fcb
Author: Staś Małolepszy <stas@mozilla.com>
Desc: Bug 1013175 - Descriptive error messages in l10n.js. r=gandalf
Bumping manifests a=b2g-bump