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

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https://hg.mozilla.org/integration/gaia-central/rev/e34f1c8158bb
Author: Greg Weng <snowmantw@gmail.com>
Desc: Merge pull request #21972 from snowmantw/issue1040607

Bug 1040607 - [Build] Documenting the utils.js

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https://hg.mozilla.org/integration/gaia-central/rev/88506fd25970
Author: Greg Weng <snowmantw@gmail.com>
Desc: Bug 1040607 - [Build] Documenting the utils.js
Bumping manifests a=b2g-bump