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

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https://hg.mozilla.org/integration/gaia-central/rev/f797c345e7f8
Author: albertopq <albert.pastor@gmail.com>
Desc: Merge pull request #25441 from albertopq/1087042-progress-top

Bug 1087042 - Rocketbar progressbar position in fullscreen-app r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/fb3fca6c6a3f
Author: albertopq <apastor@mozilla.com>
Desc: Bug 1087042 - Rocketbar progressbar position in fullscreen-app
Bumping manifests a=b2g-bump