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

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https://hg.mozilla.org/integration/gaia-central/rev/11293bff4b77
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #15939 from KevinGrandon/bug_966902_rocketbar_search_clearing

Bug 966902 - [Rocketbar] Input handling. Do not clear search term.

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https://hg.mozilla.org/integration/gaia-central/rev/72c4c83ad8f2
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 966902 - [Rocketbar] Input handling. Do not clear search term. r=benfrancis
Bumping manifests a=b2g-bump