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

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https://hg.mozilla.org/integration/gaia-central/rev/efe61b291757
Author: Kyle Machulis <kyle@nonpolynomial.com>
Desc: Merge pull request #15825 from qdot/936037-pin-failure-in-ftu

Bug 963037 - Bring up PUK entry when PIN entry retries run out

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https://hg.mozilla.org/integration/gaia-central/rev/6ce8c896d1db
Author: Kyle Machulis <kyle@nonpolynomial.com>
Desc: Bug 963037 - Bring up PUK entry when PIN entry retries run out; r=mhenretty
Bumping manifests a=b2g-bump