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

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https://hg.mozilla.org/integration/gaia-central/rev/9f135cb57a0a
Author: Dale  Harvey <dale@arandomurl.com>
Desc: Merge pull request #10677 from benfrancis/887896

Bug 887896 - Regression: Focussing address bar does not show & select URL. r=daleharvey

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https://hg.mozilla.org/integration/gaia-central/rev/9b39ec340c4d
Author: Ben Francis <ben@tola.me.uk>
Desc: Bug 887896 - Regression: Focussing address bar does not show & select URL