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

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https://hg.mozilla.org/integration/gaia-central/rev/5079071128a3
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #13565 from RudyLu/keyboard/Bug905241_and_Bug925318-disabled_keyboard_tutorial

Bug 925318 - Remove first time explanation on how to close the keyboard. r=rudylu
  - Also fixed Bug 905241.

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https://hg.mozilla.org/integration/gaia-central/rev/1a8f04c3c0ef
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Bug 925318 - Remove first time explanation on how to close the keyboard