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

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https://hg.mozilla.org/integration/gaia-central/rev/a81626341046
Author: vingtetun <21@vingtetun.org>
Desc: Merge pull request #13916 from vingtetun/bug937101

Bug 937101 - [status bar] unable to grab down the status bar. r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/e71eb28e32c5
Author: Vivien Nicolas <21@vingtetun.org>
Desc: Bug 937101 - [status bar] unable to grab down the status bar. r=alive