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

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https://hg.mozilla.org/integration/gaia-central/rev/702526cfe584
Author: Sherman Chen <shamenchens@users.noreply.github.com>
Desc: Merge pull request #23545 from shamenchens/Bug1048804-FirefoxAccountDialogPosition

Bug 1048804 - Fix Firefox account dialog position, r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/11ba0148c22a
Author: Sherman Chen <shamen.chens@gmail.com>
Desc: Bug 1048804 - Fix Firefox account dialog position
Bumping manifests a=b2g-bump