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

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https://hg.mozilla.org/integration/gaia-central/rev/62905c39e74e
Author: Diego Marcos <diego.marcos@gmail.com>
Desc: Merge pull request #15123 from dmarcos/bug934657

Bug 934657 - [Camera] Restructuring code following model / view pattern

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https://hg.mozilla.org/integration/gaia-central/rev/9bec90f44f1b
Author: Diego Marcos <diego.marcos@gmail.com>
Desc: Bug 934657 - [Camera] Restructuring code following model / view pattern