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

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https://hg.mozilla.org/integration/gaia-central/rev/79c786d6954d
Author: Dominic Kuo <dkuo@mozilla.com>
Desc: Merge pull request #22982 from shamenchens/Bug1043708-MusicSearchBar-master

Bug 1043708 - Music app search button should not have gradient background, r=dominickuo

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https://hg.mozilla.org/integration/gaia-central/rev/1d3f294bd40f
Author: Sherman Chen <shamen.chens@gmail.com>
Desc: Bug 1043708 - Music app search button should not have gradient background
Bumping manifests a=b2g-bump