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

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https://hg.mozilla.org/integration/gaia-central/rev/9c69f44b84b2
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #17018 from pacorampas/974296

Bug 974296 - Facebook Link view is broken

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https://hg.mozilla.org/integration/gaia-central/rev/9436d749ba1a
Author: Paco Rampas <pacorampas@gmail.com>
Desc: Bug 974296 - Facebook Link view is broken
Bumping manifests a=b2g-bump