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

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https://hg.mozilla.org/integration/gaia-central/rev/f96c71f7ec88
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Merge pull request #12445 from Rik/incoming-tap-screen-901168

Bug 901168 - Tapping the center of the screen while receiving a call lea... r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/35c74712ccf2
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Bug 901168 - Tapping the center of the screen while receiving a call leaves the call in an unanswerable state