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

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https://hg.mozilla.org/integration/gaia-central/rev/7b595379c0f9
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #13346 from teodosia/dialersms2

Bug 932725 - Add a test to check that the "dial" activity is working

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https://hg.mozilla.org/integration/gaia-central/rev/6e8ca17b6775
Author: Teodosia Pop <teodosia.pop@gmail.com>
Desc: Bug 932725 - Add a test to check that the "dial" activity is working