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

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https://hg.mozilla.org/integration/gaia-central/rev/09ad47223d65
Author: Julien Wajsberg <felash@gmail.com>
Desc: Merge pull request #18785 from julienw/1001422-enable-mozsamplesize-debug

Bug 1001422 - Enable "image.mozsamplesize.enabled" for DEBUG=1 profiles ...

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https://hg.mozilla.org/integration/gaia-central/rev/7aac9066ba83
Author: Julien Wajsberg <felash@gmail.com>
Desc: Bug 1001422 - Enable "image.mozsamplesize.enabled" for DEBUG=1 profiles r=yurenju
Bumping manifests a=b2g-bump