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

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https://hg.mozilla.org/integration/gaia-central/rev/5b8b45a8ffef
Author: Greg Weng <snowmantw@gmail.com>
Desc: Merge pull request #14154 from snowmantw/issue943807

Bug 943807 - [TestAgent] Better UI for TestAgent app: search box and wrapping lines

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https://hg.mozilla.org/integration/gaia-central/rev/f865340edec9
Author: Greg Weng <snowmantw@gmail.com>
Desc: Bug 943807 - [TestAgent] Better UI for TestAgent app: search box and wrapping lines