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

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https://hg.mozilla.org/integration/gaia-central/rev/179a63a8b422
Author: Eitan Isaacson <eitan@monotonous.org>
Desc: Merge pull request #18960 from eeejay/bug-995025

Bug 995025 - Make keyboard word suggestions accessible. r=rlu

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https://hg.mozilla.org/integration/gaia-central/rev/113824d126ef
Author: Eitan Isaacson <eitan@monotonous.org>
Desc: Bug 995025 - Make keyboard word suggestions accessible.
Bumping manifests a=b2g-bump