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

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https://hg.mozilla.org/integration/gaia-central/rev/f46b625940b8
Author: Germán Toro del Valle <gtorodelvalle@gmail.com>
Desc: Merge pull request #14777 from gtorodelvalle/contacts-bug-948817-enter-clears-custom-tag

Bug 948817 - [fugu][buri][contact] tap on 'enter' on keyboard will clear all input in custom label (r=jmcanterafonseca)

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https://hg.mozilla.org/integration/gaia-central/rev/826f317dfd6c
Author: Germán Toro del Valle <gtorodelvalle@gmail.com>
Desc: Bug 948817 - [fugu][buri][contact] tap on 'enter' on keyboard will clear all input in custom label