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

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https://hg.mozilla.org/integration/gaia-central/rev/92c56cbad968
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #24584 from KevinGrandon/bug_1074703_value_selector_destroy

Bug 1074703 - [ValueSelector] Ensure window listener is removed on destroy

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https://hg.mozilla.org/integration/gaia-central/rev/958b136324b9
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1074703 - [ValueSelector] Ensure window listener is removed on destroy r=alive r=gasolin
Bumping manifests a=b2g-bump