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

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https://hg.mozilla.org/integration/gaia-central/rev/2e7106da13e9
Author: gasolin <gasolin@gmail.com>
Desc: Merge pull request #13727 from MBRSL/bug-929318-radio

Bug 929318 - [HW test] Radio test, r=gasolin

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https://hg.mozilla.org/integration/gaia-central/rev/4f6f769f8b5d
Author: Tom Jao <tjao@mozilla.com>
Desc: Bug 929318 - [HW test] Radio test