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/1f935688469b
Author: Julien Wajsberg <felash@gmail.com>
Desc: Merge pull request #15711 from steveck-chung/DSDS-sim_switch_for_MMS

Bug 961938 - [DSDS][MMS] Switching data confirmation message will pop up twice r=julien
(cherry picked from commit 9497e89bbf6060d1a837a7ccbf396f8c359eb13b)

Conflicts:
	apps/sms/test/unit/thread_ui_test.js