Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_3/rev/945555073cbe
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Merge pull request #16721 from lissyx/bug970832

Bug 970832 - Balance pending image loading counter

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https://hg.mozilla.org/integration/gaia-1_3/rev/4cb8d7836809
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Merge pull request #16543 from mikehenrty/bug-974211-calllist

Bug 974211 - [B2G] [Dialer] Group call phone numbers are truncated, r=etienne
Conflicts:
	apps/communications/dialer/test/unit/calls_handler_test.js

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https://hg.mozilla.org/integration/gaia-1_3/rev/3bb630b0163e
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #16670 from crdlc/bug-956319

Bug 956319 - [Homescreen] Short, high velocity swipes should move to nex...
Conflicts:
	apps/homescreen/build/build.js
Bumping manifests a=b2g-bump