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

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https://hg.mozilla.org/integration/gaia-central/rev/ed24bb44a3c6
Author: James Lal <james@lightsofapollo.com>
Desc: Merge pull request #20555 from crdlc/bug-1025835

Bug 1025835 - [Vertical Homescreen] Loading animation while downloading app is broken

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https://hg.mozilla.org/integration/gaia-central/rev/8734c248baab
Author: crdlc <crdlc@tid.es>
Desc: Bug 1025835 - [Vertical Homescreen] Loading animation while downloading app is broken
Bumping manifests a=b2g-bump