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

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https://hg.mozilla.org/integration/gaia-central/rev/e92a90b3b810
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #15973 from crdlc/bug-968113

Bug 968113 - Homescreen loading circle is not centered on the icon

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https://hg.mozilla.org/integration/gaia-central/rev/01482c9aaedb
Author: crdlc <crdlc@tid.es>
Desc: Bug 968113 - Homescreen loading circle is not centered on the icon
Bumping manifests a=b2g-bump