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

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https://hg.mozilla.org/integration/gaia-central/rev/fc14afb62388
Author: lissyx <lissyx+github@lissyx.dyndns.org>
Desc: Merge pull request #14658 from lissyx/bug950070

Bug 950070 - Perform correct localization of the roaming notifier on lockscreen r=kaze

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https://hg.mozilla.org/integration/gaia-central/rev/bbcaf255cf16
Author: Alexandre Lissy <lissyx+github@lissyx.dyndns.org>
Desc: Bug 950070 - Perform correct localization of the roaming notifier on lockscreen

The localize() method takes as a third argument an object, not a string.
Doing this like this results in a lockscreen not substituting correctly
and hence displaying ``{{operator}} (Roaming)'' to the user.