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

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https://hg.mozilla.org/integration/gaia-1_3/rev/947ff99ea34b
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Merge pull request #16994 from mikehenrty/bug-979624-connecting

Bug 979624 - [B2G][Dialer][All languages] Performing a call while in a c..., r=etienne

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https://hg.mozilla.org/integration/gaia-1_3/rev/572a6f481978
Author: James Burke <jrburke@gmail.com>
Desc: Merge pull request #17172 from jrburke/bug966147-email-notification-click-close

Bug 966147 - Email Notification doesnt go away when I click on it r=asuth
Bumping manifests a=b2g-bump