Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/c9d33f4aa3eb
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #22940 from KevinGrandon/bug_1047645_system_timeout_reland_2

Bug 1047645 - Use manual timeout to guard _closed event from not firing

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https://hg.mozilla.org/integration/gaia-central/rev/3726ef67f3c5
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1047645 - Use manual timeout to guard _closed event from not firing r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/53952a72f76d
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Revert "Bug 1047645 - Use manual timeout to guard _closed event from not firing r=alive"

This reverts commit bf33987e2729e82f1e3891eba3e85713f476fd0e.
Bumping manifests a=b2g-bump