Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/040a66cffe8f
Author: Yuren Ju <yurenju@gmail.com>
Desc: Merge pull request #16203 from yurenju/settings-blackhole

Bug 971621 - remove unnecessary code in build/applications-data.js for s... r=@timdream

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https://hg.mozilla.org/integration/gaia-central/rev/75e0673f9949
Author: Yuren Ju <yurenju@gmail.com>
Desc: Bug 971621 - remove unnecessary code in build/applications-data.js for settings refactoring

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https://hg.mozilla.org/integration/gaia-central/rev/07e9a488b907
Author: Zac Campbell <zcampbell@mozilla.com>
Desc: Bug 971640 - Disable all python clock tests until intermittents resolved.
Bumping manifests a=b2g-bump