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

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https://hg.mozilla.org/integration/gaia-central/rev/e81a1f281a1d
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1054314 - [GaiaButtons] Default background color should be white r=me
Bumping manifests a=b2g-bump
Bug 1026997 - Use nsISelectionPrivate to track selection changes in forms.js. r=yxl
Bug 1037380 - Add system message broadcast filter. r=fabrice
Bug 1049235 - [MADAI][Multimedia] Some RTSP link does not operate seek function. r=sworkman