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

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https://hg.mozilla.org/integration/gaia-central/rev/faea6ec0be40
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #11683 from LeeChSien/Bug_902741

Bug 902741 - [Test][System] Unit test for WiFi, r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/018d0bfcc07f
Author: Jason Lee <chsien@gmail.com>
Desc: Bug 902741 - [Test][System] Unit test for WiFi