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

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https://hg.mozilla.org/integration/gaia-central/rev/bb4a52c0438c
Author: Fernando Jiménez Moreno <ferjmoreno@gmail.com>
Desc: Merge pull request #11229 from ferjm/paymenteventlistener

Bug 899153 - TypeError: this.removeEventListener is not a function in pa...

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https://hg.mozilla.org/integration/gaia-central/rev/dd1834c7454a
Author: Fernando Jiménez <ferjmoreno@gmail.com>
Desc: Bug 899153 - TypeError: this.removeEventListener is not a function in payment.js. r=vingtetun
Bug 833754 - Part 1: RIL changes for call barring through MMI codes. r=ferjm
Bug 833754 - Part 2: Changes in tests for call barring through MMI codes. r=ferjm