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

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https://hg.mozilla.org/integration/gaia-central/rev/79b7654e3865
Author: George <georgeiscoming@gmail.com>
Desc: Merge pull request #20910 from cctuan/1023087

Bug 1023087 - [Window Management] Marionette test for copy-paste

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https://hg.mozilla.org/integration/gaia-central/rev/7246b297c8b6
Author: cctuan <georgeiscoming@gmail.com>
Desc: Bug 1023087 - [Window Management] Marionette test for copy-paste
Bumping manifests a=b2g-bump