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

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https://hg.mozilla.org/integration/gaia-central/rev/cda761e6961f
Author: RickyChien <ricky060709@gmail.com>
Desc: Merge pull request #24741 from RickyChien/bug-1053703

Bug 1053703 - Merge pre-app.js, app.js and post-app.js to one javascript file r=gduan

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https://hg.mozilla.org/integration/gaia-central/rev/1cf22769af7e
Author: Yuren Ju <yurenju@gmail.com>
Desc: Bug 1053703 - Merge pre-app.js, app.js and post-app.js to one javascript file r=gduan
Bumping manifests a=b2g-bump