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

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https://hg.mozilla.org/integration/gaia-central/rev/38ef06586fad
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #10794 from alivedise/bugzilla/889175/incoming-call-statusbar

Bug 889175 - Fix UI problem of fullscreen app when call incoming, r=timdream, a=leo+

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https://hg.mozilla.org/integration/gaia-central/rev/fe83e3a42657
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 889175 - Fix UI problem of fullscreen app when call incoming