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

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https://hg.mozilla.org/integration/gaia-central/rev/c230bc6071ba
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #19137 from KevinGrandon/bug_971506_system2_internet_sharing

Bug 971506 - [System2] Instantiable InternetSharing

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https://hg.mozilla.org/integration/gaia-central/rev/f5346adf8c9a
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 971506 - [System2] Instantiable InternetSharing r=alive
Bumping manifests a=b2g-bump