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

========

https://hg.mozilla.org/integration/gaia-central/rev/a5b50081635b
Author: Fernando Jiménez Moreno <ferjmoreno@gmail.com>
Desc: Merge pull request #12313 from ferjm/bug915038.imei

Bug 915038 - [Dialer] MMI codes not working in dialer app. r=rik

========

https://hg.mozilla.org/integration/gaia-central/rev/e3d3374484d8
Author: Fernando Jiménez <ferjmoreno@gmail.com>
Desc: Bug 915038 - [Dialer] IMEI code not working in dialer app. r=rik