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

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https://hg.mozilla.org/integration/gaia-central/rev/279981719dfd
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #20891 from RudyLu/keyboard/Bug1028551_commit

Bug 1028551 - Add "da" danish to keyboard-layouts.json.
r=rudylu

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https://hg.mozilla.org/integration/gaia-central/rev/cda7575b21fc
Author: scootergrisen <scootergrisen@gmail.com>
Desc: Bug 1028551 - Add "da" danish to keyboard-layouts.json.
Bumping manifests a=b2g-bump