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

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https://hg.mozilla.org/integration/gaia-central/rev/9eee5ebbc781
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #21002 from KevinGrandon/bug_1030452_intermittent_app_install_test

Bug 1030452 - Intermittent failing test, Vertical Home - Packaged App Install install app

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https://hg.mozilla.org/integration/gaia-central/rev/a617c12ba6b2
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1030452 - Intermittent failing test, Vertical Home - Packaged App Install install app
Bumping manifests a=b2g-bump