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

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https://hg.mozilla.org/integration/gaia-central/rev/bddb3c140ef6
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Merge pull request #22043 from arcturus/bug-1042027

Bug 1042027 - [Larger icons in homescreen] Given a set of icons pick up the best suitable one r=alive r=daleharvey

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https://hg.mozilla.org/integration/gaia-central/rev/8978499906c1
Author: Francisco Jordano <fjordano@mozilla.com>
Desc: Bug 1042027 - [Larger icons in homescreen] Given a set of icons pick up the best suitable one
Bumping manifests a=b2g-bump