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

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https://hg.mozilla.org/integration/gaia-central/rev/c1e90942f710
Author: albertopq <albert.pastor@gmail.com>
Desc: Merge pull request #25632 from albertopq/1091069-regression-1087042

Bug 1091069 - Restoring the progress bar on the browser r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/a3df84b30f5b
Author: albertopq <apastor@mozilla.com>
Desc: Bug 1091069 - Restoring the progress bar on the browser
Bumping manifests a=b2g-bump