Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-2_1/rev/4d3e506ebbb1
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1063694 - [System] Fix SearchWindow prototype r=alive

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https://hg.mozilla.org/integration/gaia-2_1/rev/a4c354ba683f
Author: Ryan VanderMeulen <ryanvm@gmail.com>
Desc: Merge pull request #23932 from cctuan/1059822-v21

Bug 1059822 - close simpindialog if lockscreen is unlocked to camera app

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https://hg.mozilla.org/integration/gaia-2_1/rev/4471d30fcd1b
Author: cctuan <georgeiscoming@gmail.com>
Desc: Bug 1059822 - close simpindialog if lockscreen is unlocked to camera app
Bumping manifests a=b2g-bump