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

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https://hg.mozilla.org/integration/gaia-central/rev/482bb821550b
Author: Wilson Page <wilsonpage@me.com>
Desc: Merge pull request #20022 from wilsonpage/1020399

Bug 1020399 - Update component_utils with shadow-dom style fix

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https://hg.mozilla.org/integration/gaia-central/rev/cabff6bc314a
Author: Wilson Page <wilsonpage@me.com>
Desc: Bug 1020399 - Update component_utils with shadow-dom style fix

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https://hg.mozilla.org/integration/gaia-central/rev/9d795d6d3442
Author: ochameau <poirot.alex@gmail.com>
Desc: Merge pull request #19882 from ochameau/improve-build-time

Bug 1019058 - Improve single app build time. r=yurenju

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https://hg.mozilla.org/integration/gaia-central/rev/913441e74921
Author: Alexandre Poirot <poirot.alex@gmail.com>
Desc: Bug 1019058 - Improve single app build time. r=yurenju

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https://hg.mozilla.org/integration/gaia-central/rev/fdb9a9102b90
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #19957 from KevinGrandon/bug_1016239_collections_dedupe

Bug 1016239 - [Collections App] Do not show web results that are pinned to Collection

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https://hg.mozilla.org/integration/gaia-central/rev/06c423f2891e
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1016239 - [Collections App] Do not show web results that are pinned to Collection r=ranbena r=amirn
Bumping manifests a=b2g-bump