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

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https://hg.mozilla.org/integration/gaia-central/rev/08658bdfdc15
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #19717 from AntonioMA/bug971618

Bug 971618 - Add support for OMA DRM direct downloads

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https://hg.mozilla.org/integration/gaia-central/rev/217096566ba7
Author: Antonio M. Amaya <amac@tid.es>
Desc: Bug 971618 - Add support for OMA DRM direct downloads

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https://hg.mozilla.org/integration/gaia-central/rev/a867498fc6de
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #20877 from crdlc/bug-1028692

Bug 1028692 - [Collection app] Deleted Smart Collections reappear after restart

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https://hg.mozilla.org/integration/gaia-central/rev/51e635c5dd8e
Author: crdlc <crdlc@tid.es>
Desc: Bug 1028692 - [Collection app] Deleted Smart Collections reappear after restart
Bumping manifests a=b2g-bump