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

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https://hg.mozilla.org/integration/gaia-central/rev/e6907e3fdcce
Author: Fernando Campo <fernando.campo@o2.com>
Desc: Merge pull request #13516 from fcampo/sim-import-FTE-933381

Bug 933381 - [FTE] No message when importing from empty SIM (r=jmcf)

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https://hg.mozilla.org/integration/gaia-central/rev/f325903f1057
Author: Fernando Campo <fernando.campo@o2.com>
Desc: Bug 933381 - [B2G][FTE] No message is presented when attempting to import contacts from an empty SIM card