Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_4/rev/c227ca15e80a
Author: Stephen Donner <stephen.donner@gmail.com>
Desc: Merge pull request #20699 from dchunwong/upliftwifi

Backport fix to Bug 1004138 - Add a step to cleanup_data to eliminate remembered networks

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https://hg.mozilla.org/integration/gaia-1_4/rev/5f82f11f7ba7
Author: Dylan Chun Wong <d.chunwong@gmail.com>
Desc: backport fix to Bug 1004138 - Add a step to cleanup_data to eliminate remembered networks
Bumping manifests a=b2g-bump