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

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https://hg.mozilla.org/integration/gaia-central/rev/3f670caeba0a
Author: RickyChien <ricky060709@gmail.com>
Desc: Merge pull request #20416 from RickyChien/bug-1011589-follow-up

Bug 1011589 - Follow-up, update gaia_node_modules.revision r=me

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https://hg.mozilla.org/integration/gaia-central/rev/0b783fcb957a
Author: Ricky Chien <ricky060709@gmail.com>
Desc: Bug 1011589 - Follow-up, update gaia_node_modules.revision

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https://hg.mozilla.org/integration/gaia-central/rev/4e0b7af3ab2f
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #20401 from KevinGrandon/bug_1020959_statusbar_geolocation

Bug 1020959 - [vertical] search bar is visible when geolocation prompt is present

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https://hg.mozilla.org/integration/gaia-central/rev/ab61c882a29d
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1020959 - [vertical] search bar is visible when geolocation prompt is present r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/8467626e66f9
Author: RickyChien <ricky060709@gmail.com>
Desc: Merge pull request #19812 from RickyChien/bug-1011589

Bug 1011589 - Use mocha.css directly instead of copying the CSS from mocha.css to test-agent.css r=@julienw

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https://hg.mozilla.org/integration/gaia-central/rev/a4ac9d5db816
Author: Ricky Chien <ricky060709@gmail.com>
Desc: Bug 1011589 - Use mocha.css directly instead of copying the CSS from mocha.css to test-agent.css
Bumping manifests a=b2g-bump