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

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https://hg.mozilla.org/integration/gaia-central/rev/f3d773f5e169
Author: Hubert Figuière <hub@figuiere.net>
Desc: Merge pull request #22498 from hfiguiere/bug1033402-2

Bug 1033402 - Bump gaia node modules. r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/15b72a0c7cae
Author: Hubert Figuière <hub@figuiere.net>
Desc: Bug 1033402 - Bump gaia node modules.

See also bug 1027232
Bumping manifests a=b2g-bump