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

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https://hg.mozilla.org/integration/gaia-central/rev/744ef5fa84a3
Author: Ghislain 'Aus' Lacroix <aus@noiseport.org>
Desc: Merge pull request #12453 from nullaus/bug917582-operator-variant-console

bug 917582 - OperatorVariantHelper error when IccHelper.enabled == false...

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https://hg.mozilla.org/integration/gaia-central/rev/c5cf75d8cf0e
Author: Ghislain 'Aus' Lacroix <aus@mozilla.com>
Desc: bug 917582

-OperatorVariantHelper error when IccHelper.enabled == false should be more descriptive since it is an expected error when running in b2g desktop or fxos simulator.
-Do not throw when IccHelper is undefined, it only indicates that the feature was omitted in the build

r=dflanagan