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

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https://hg.mozilla.org/integration/gaia-central/rev/9a8b47d9ce37
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Merge pull request #23861 from sergi/BUG_1061506

Bug 1061506 - Icons in contact edit form looking a bit fuzzy r=francisco

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https://hg.mozilla.org/integration/gaia-central/rev/fbfa537fb8cc
Author: Sergi Mansilla <sergi.mansilla@gmail.com>
Desc: Bug 1061506 - Icons in contact edit form looking a bit fuzzy
Bumping manifests a=b2g-bump