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

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https://hg.mozilla.org/integration/gaia-central/rev/43938cb4eedc
Author: steveck-chung <schung@mozilla.com>
Desc: Merge pull request #11947 from steveck-chung/cdma-emergencyCbMode

Bug 881863 - [Gaia] B2G CDMA UI support for emergency call back mode. r=alive, a=koi+.

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https://hg.mozilla.org/integration/gaia-central/rev/9a1becdb5005
Author: Steve Chung <schung@mozilla.com>
Desc: Bug 881863 - [Gaia] B2G CDMA UI support for emergency call back mode