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

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https://hg.mozilla.org/integration/gaia-central/rev/c5212e1b9a03
Author: Gabriele Svelto <gsvelto@mozilla.com>
Desc: Merge pull request #23786 from iFadey/bug-1062269

Bug 1062269 - Load JSON file with shared function in the WhiteList object r=gsvelto

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https://hg.mozilla.org/integration/gaia-central/rev/880534dece49
Author: Fawad Hassan <ifadey@ymail.com>
Desc: Bug 1062269 - Load JSON file with shared function in the WhiteList object

r=gsvelto
Bumping manifests a=b2g-bump