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

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https://hg.mozilla.org/integration/gaia-central/rev/c10a5f7f7e2f
Author: Diego Marcos <diego.marcos@gmail.com>
Desc: Merge pull request #16819 from dmarcos/bug974730

Bug 974730 - [Camera] Camera Library has to listen for the onPreviewStat...

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https://hg.mozilla.org/integration/gaia-central/rev/c82911658e3a
Author: Diego Marcos <diego.marcos@gmail.com>
Desc: Bug 974730 - [Camera] Camera Library has to listen for the onPreviewStateChange event
Bumping manifests a=b2g-bump