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

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https://hg.mozilla.org/integration/gaia-central/rev/311adb0a5834
Author: James Lal <james@lightsofapollo.com>
Desc: Merge pull request #14980 from lightsofapollo/revert-c38d3842daa97cea360fce1af82f2d7b78134bc3

Revert "Merge pull request #13363 from dmarcos/bug934657"

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https://hg.mozilla.org/integration/gaia-central/rev/287d929a42ca
Author: James Lal <james@lightsofapollo.com>
Desc: Revert "Merge pull request #13363 from dmarcos/bug934657"

This reverts commit c38d3842daa97cea360fce1af82f2d7b78134bc3, reversing
changes made to 5de94a2be6ab8d33434294d70c1de330f55d8f2d.