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

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https://hg.mozilla.org/integration/gaia-central/rev/934b8c3014a3
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Merge pull request #25058 from timdream/screen-wake-lock-manager

Bug 1081630 - Implement WakeLockManagers, r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/3de3252d9d42
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Bug 1081630 - Implement WakeLockManagers
Bumping manifests a=b2g-bump