Bumping gaia.json for 2 gaia-1_3 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_3/rev/cbedc56144b1
Author: Fabien Cazenave <fabien@mozilla.com>
Desc: Merge pull request #15354 from Pike/bug-959406-1.3-languages

bug 959406, fix up language lists for 1.3, r=kaze

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https://hg.mozilla.org/integration/gaia-1_3/rev/fffdce894d01
Author: Axel Hecht <axel@pike.org>
Desc: bug 959406, fix up language lists for 1.3