Bumping gaia.json for 6 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-2_1/rev/9faf32017652
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 1065731 - When adding a number to an existing contact, search icon does nothing

Conflicts:
	shared/pages/import/style/search.css

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https://hg.mozilla.org/integration/gaia-2_1/rev/fcc878faa5ae
Author: Arthur Chen <crh0716@gmail.com>
Desc: Bug 1071366 - Add the missed case of erasing call forwarding settings

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https://hg.mozilla.org/integration/gaia-2_1/rev/4c3fd9c430c9
Author: Diego Marcos <diego.marcos@gmail.com>
Desc: Bug 1082116 - [Camera] Face detection does not work after touch focus

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https://hg.mozilla.org/integration/gaia-2_1/rev/6af016d0c1b6
Author: Chris Lord <chrislord.net@gmail.com>
Desc: Merge pull request #25185 from Cwiiis/bug1061466-system-update-splash

Bug 1061466 - Show a splash screen when doing a system update. r=alive
Conflicts:
	apps/system/style/update_manager/update_manager.css

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https://hg.mozilla.org/integration/gaia-2_1/rev/c569c2b2d88b
Author: Guillaume Marty <edo999@gmail.com>
Desc: Bug 1074683 - Status bar signal strength update triggers reflow/restyles

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https://hg.mozilla.org/integration/gaia-2_1/rev/f77b7b81e643
Author: Alexandre Lissy <lissyx+github@lissyx.dyndns.org>
Desc: Bug 1059546 - Set proper mozApps signed origins for eng builds r=rchien

Engineering builds needs to accept signed apps from stage Marketplace
for testing purpose. This depends on Gecko having a proper
setting-to-pref mapping for dom.mozApps.signed_apps_installable_from.

Conflicts:
	build/settings.js
Bumping manifests a=b2g-bump