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

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https://hg.mozilla.org/integration/gaia-central/rev/777220fad4d2
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #23498 from KevinGrandon/bug_1059758_search_result_clear_timing

Bug 1059758 - [Search] Do not clear results until we are ready to display a search

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https://hg.mozilla.org/integration/gaia-central/rev/7fe3aaea4fc6
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1059758 - [Search] Do not clear results until we are ready to display a search ui-r=djabber r=kgrandon
Bumping manifests a=b2g-bump