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

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https://hg.mozilla.org/integration/gaia-central/rev/d71a3e5ede0d
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Merge pull request #22798 from mikehenrty/bug-1044984-disable-worker

Bug 1044984 - disable worker_test.js in tbpl

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https://hg.mozilla.org/integration/gaia-central/rev/93bcb5fbb9fc
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Bug 1044984 - disable worker_test.js in tbpl
Bumping manifests a=b2g-bump