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

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https://hg.mozilla.org/integration/gaia-central/rev/8ef9b6d92efd
Author: Fernando Campo <fernando.campo@o2.com>
Desc: Merge pull request #11507 from fcampo/contactActivity-900446

Bug 900446 - Pick Contact Activity filtered by webcontact/tel should return filtered tel info and contact data (r=arcturus)

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https://hg.mozilla.org/integration/gaia-central/rev/f23fe3f3ceb7
Author: Fernando Campo <fernando.campo@o2.com>
Desc: Bug 900446 - Pick Contact Activity filtered by webcontact/tel should return filtered tel info and contact data