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

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https://hg.mozilla.org/integration/gaia-central/rev/63e80c1710e0
Author: Zibi Braniecki <zbigniew.braniecki@gmail.com>
Desc: Merge pull request #18877 from zbraniecki/999132-mozl10n-in-camera

Bug 999132 - Improve and document the use of mozL10n API in camera app. r=wilsonpage

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https://hg.mozilla.org/integration/gaia-central/rev/e1bc178e18d7
Author: Zbigniew Braniecki <gandalf@mozilla.com>
Desc: Bug 999132 - Improve and document the use of mozL10n API in camera app. r=wilsonpage
Bumping manifests a=b2g-bump