Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-2_0/rev/425694993809
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #20750 from RudyLu/keyboard/Bug1015541

Bug 1015541 - choosing a word suggestion after moving the caret changes the wrong text
r=janjongboom
(cherry picked from commit 73b9c780c54ec1c6fcf47c2ce467672d3c5aaded)
a=1.4+
Bumping manifests a=b2g-bump