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

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https://hg.mozilla.org/integration/gaia-central/rev/7a44f8a89046
Author: Diego Marcos <diego.marcos@gmail.com>
Desc: Merge pull request #15418 from wilsonpage/bug/897199

Bug 897199 - Camera should not request geolocation if no SD card was det...

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https://hg.mozilla.org/integration/gaia-central/rev/63dac6f0c606
Author: Wilson Page <wilsonpage@me.com>
Desc: Bug 897199 - Camera should not request geolocation if no SD card was detected
Bumping manifests a=b2g-bump