Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/f2f63ae3283f
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Revert "Merge pull request #19753 from mnjul/bug_962902_duplicate_blob_url_in_system_app"

This reverts commit 053de51fcb7d1cd0553d3dd092e1974fda62a1f3, reversing
changes made to e98fe1e94d3d80ad36903500d8ca3333904b162c.
Bumping manifests a=b2g-bump