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

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https://hg.mozilla.org/integration/gaia-central/rev/b97f6609ff3a
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #23770 from KevinGrandon/bug_1062119_start_stop_progress

Bug 1062119 - Do not animate gaia-progress by default

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https://hg.mozilla.org/integration/gaia-central/rev/bf5a78f131f3
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1062119 - Do not animate gaia-progress by default r=gsvelto
Bumping manifests a=b2g-bump