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

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https://hg.mozilla.org/integration/gaia-2_0/rev/7d70d7cb29bf
Author: Fernando Jiménez <ferjmoreno@gmail.com>
Desc: Bug 1059488 - [MobileID] Country code manual selection dialog seems broken. r=alive

Conflicts:
	apps/system/js/mobileid_dialog.js
Bumping manifests a=b2g-bump