Bumping gaia.json for 4 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/28be1eda8db7
Author: vingtetun <21@vingtetun.org>
Desc: Merge pull request #13952 from vingtetun/bug941950.followup

Bug 941950 - Prevent a click to fire when the home button is pressed on ...

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https://hg.mozilla.org/integration/gaia-central/rev/e4babdec81da
Author: Vivien Nicolas <21@vingtetun.org>
Desc: Bug 941950 - Prevent a click to fire when the home button is pressed on some devices. r=me

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https://hg.mozilla.org/integration/gaia-central/rev/7ef5cf8f97c1
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #13938 from crh0716/941511

Bug 941511 - Add CDMA 1x networks to CDMA types r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/21aeba286d1d
Author: Arthur Chen <crh0716@gmail.com>
Desc: Bug 941511 - Add CDMA 1x networks to CDMA types