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

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https://hg.mozilla.org/integration/gaia-central/rev/a4ca66875990
Author: James Lal <james@lightsofapollo.com>
Desc: Merge pull request #13100 from lightsofapollo/revert-4c652c5

Revert "Merge pull request #13097 from dmarcos/bug928614"

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https://hg.mozilla.org/integration/gaia-central/rev/2c17c8a26ed7
Author: James Lal <james@lightsofapollo.com>
Desc: Revert "Merge pull request #13097 from dmarcos/bug928614"

This reverts commit 4c652c5ca43f301217cbabf8f781b93a860bec37, reversing
changes made to afbf45f26a73b7cd5e0a831bea48087331975286.