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

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https://hg.mozilla.org/integration/gaia-central/rev/13a57722bfd5
Author: Eitan Isaacson <eitan@monotonous.org>
Desc: Merge pull request #19889 from eeejay/bug-1019139

Bug 1019139 - Make switch element inline-block. r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/76dcefcbbdae
Author: Eitan Isaacson <eitan@monotonous.org>
Desc: Bug 1019139 - Make switch element inline-block.
Bumping manifests a=b2g-bump