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

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https://hg.mozilla.org/integration/gaia-central/rev/70ead06003e6
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Merge pull request #17323 from Rik/jshint-settings-985409

Bug 985409 -  Fix JSHint issues with test/unit/setup.js r=arthur

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https://hg.mozilla.org/integration/gaia-central/rev/7ef356fbe891
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Bug 985409 -  Fix JSHint issues with test/unit/setup.js
Bumping manifests a=b2g-bump