Bumping gaia.json for 1 gaia-1_3 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_3/rev/47588d2617c9
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Merge pull request #15874 from Rik/simslot-965155

Bug 965155 - SIM manager will set all outgoing settings to SIM 2 after r... r=etienne
(cherry picked from commit 0cb3631191ef12947e981c0ff35e9d27256972cf)