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

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https://hg.mozilla.org/integration/gaia-central/rev/6d701d9ba0cc
Author: Ben Francis <ben@tola.me.uk>
Desc: Merge pull request #14591 from daleharvey/946807

Bug 946807 - Dont postResult to activity with no return value r=benfrancis

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https://hg.mozilla.org/integration/gaia-central/rev/95f69b580071
Author: Dale Harvey <dale@arandomurl.com>
Desc: Bug 946807 - Dont postResult to activity with no return value