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/5c538faba504
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Merge pull request #15370 from arcturus/bug-952482

Bug 952482 - [FTE] "SIM 1" is written to enter the PIN for the SIM, even...
(cherry picked from commit 95b27b6b190ab0f976ec08259ec69d808726b2ce)

Conflicts:
	apps/communications/ftu/locales/ftu.ar.properties