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

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https://hg.mozilla.org/integration/gaia-central/rev/fdd04a88091e
Author: Diego Marcos <diego.marcos@gmail.com>
Desc: Merge pull request #25169 from dmarcos/bug1081270

Bug 1081270 - [Flame][Camera] Face tracking circle stops tracking once r...

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https://hg.mozilla.org/integration/gaia-central/rev/4a4229468094
Author: Diego Marcos <diego.marcos@gmail.com>
Desc: Bug 1081270 - [Flame][Camera] Face tracking circle stops tracking once recording starts
Bumping manifests a=b2g-bump