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

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https://hg.mozilla.org/integration/gaia-central/rev/e8349cd9b132
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Merge pull request #15918 from Rik/slow-call-log-964833

Bug 964833 - Remove transitions when entering call log edit mode r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/0f7ff65574f7
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Bug 964833 - Remove transitions when entering call log edit mode

We couldn't see them anyway
Bumping manifests a=b2g-bump