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

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https://hg.mozilla.org/integration/gaia-central/rev/5ce8f34e069e
Author: Kyle Machulis <kyle@nonpolynomial.com>
Desc: Merge pull request #15694 from qdot/962913-prebuilt-idb

vbump for marionette-profile-builder with extracts feature

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https://hg.mozilla.org/integration/gaia-central/rev/14350f52bb37
Author: Kyle Machulis <kyle@nonpolynomial.com>
Desc: vbump for marionette-profile-builder with extracts feature
Bumping manifests a=b2g-bump