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

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https://hg.mozilla.org/integration/gaia-central/rev/0779d8b9a25d
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #18248 from KevinGrandon/bug_995357_search_window_browser_events

Bug 995357 - [Search] Handle OOMs and other browser events

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https://hg.mozilla.org/integration/gaia-central/rev/418ded0e0c0f
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 995357 - [Search] Handle OOMs and other browser events r=alive
Bumping manifests a=b2g-bump