Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/cf2d8ce23687
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #19930 from crdlc/bug-1019509

Bug 1019509 - Copy all collections resources from homescreen1 to collect...

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https://hg.mozilla.org/integration/gaia-central/rev/68c004e5163f
Author: crdlc <crdlc@tid.es>
Desc: Bug 1019509 - Copy all collections resources from homescreen1 to collection app

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https://hg.mozilla.org/integration/gaia-central/rev/17242db94e31
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #19972 from crh0716/1020065

Bug 1020065 - Break the dependency from connectivity.js to settings.js r=eragon

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https://hg.mozilla.org/integration/gaia-central/rev/40b71c1ef3bf
Author: Arthur Chen <crh0716@gmail.com>
Desc: Bug 1020065 - Break the dependency from connectivity.js to settings.js
Bumping manifests a=b2g-bump