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

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https://hg.mozilla.org/integration/gaia-central/rev/43e4148c36fb
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #16143 from KevinGrandon/bug_885979_remove_extra_setting

Bug 885979 - Remove unused contact setting

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https://hg.mozilla.org/integration/gaia-central/rev/546d4930d344
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 885979 - Remove unused setting r=reuben
Bumping manifests a=b2g-bump