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

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https://hg.mozilla.org/integration/gaia-central/rev/b4434ed9150a
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #25086 from RudyLu/keyboard/Bug1077757_Add_Galician_keyboard

Bug 1077757 - Galician Dictionary/Autocorrection.
r=timdream.

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https://hg.mozilla.org/integration/gaia-central/rev/97decd25014a
Author: Rudy Lu <me@rudy.lu>
Desc: Bug 1077757 - Galician Dictionary/Autocorrection.
 - Add Galician layout to host the dictionary.
Bumping manifests a=b2g-bump