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

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https://hg.mozilla.org/integration/gaia-central/rev/c258483698af
Author: Rudy Lu <left.lu@gmail.com>
Desc: Revert "Merge pull request #11645 from comoyo/new_ime_webidl"

This reverts commit 9a6e241416724a08dc1524569df96180c4ba0358, reversing
changes made to 4292d74f14438b49ebd01a4dbf89fd2748926f16.

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https://hg.mozilla.org/integration/gaia-central/rev/822cd9317cd0
Author: Rudy Lu <left.lu@gmail.com>
Desc: Revert "Merge pull request #11788 from comoyo/bug_811177"

This reverts commit 53d993416233fd1f5de3976ac49c62f5ddc465af, reversing
changes made to 3900b53a815eb60605aa52107736c2ba391110e3.