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

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https://hg.mozilla.org/integration/gaia-central/rev/aaa6df5fed4b
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Merge pull request #26767 from timdream/keyboard-indexeddb

Bug 1111482 - Introduce PromiseStorage, r=mnjul

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https://hg.mozilla.org/integration/gaia-central/rev/41c21d53d1f9
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Bug 1111482 - Introduce PromiseStorage
Bumping manifests a=b2g-bump