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

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https://hg.mozilla.org/integration/gaia-central/rev/2241041206a0
Author: Etienne Segonzac <etienne@segonzac.info>
Desc: Merge pull request #25142 from etiennesegonzac/bug-1082645

Bug 1082645 - Cover the fullscreen_layout software home button toggle with marionette tests r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/1e6d2c5305eb
Author: Etienne Segonzac <etienne@segonzac.info>
Desc: Bug 1082645 - Cover the fullscreen_layout software home button toggle with a marionette test
Bumping manifests a=b2g-bump