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

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https://hg.mozilla.org/integration/gaia-2_0/rev/c29a28ac47b2
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #22942 from KevinGrandon/bug_1047645_to_2_dot_oh_2

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

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https://hg.mozilla.org/integration/gaia-2_0/rev/e456807aab96
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-2_0/rev/55017d8a46d2
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