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

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https://hg.mozilla.org/integration/gaia-central/rev/daf039f9ad04
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #12555 from rnowm/922124

Bug 922124 - [Contacts] Close button in the import FB contacts screen is shown with vertical white lines

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https://hg.mozilla.org/integration/gaia-central/rev/3befbbf6ba5c
Author: rnowm <arnau@arnaumarch.com>
Desc: Bug 922124 - [Contacts] Close button in the import FB contacts screen is shown with vertical white lines