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

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https://hg.mozilla.org/integration/gaia-central/rev/61803078a135
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #20537 from KevinGrandon/bug_1021496_bookmark_icons

Bug 1021496 - [Vertical] Implement bookmark app icon design from Classic Homescreen

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https://hg.mozilla.org/integration/gaia-central/rev/042f644911dc
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1021496 - [Vertical] Implement bookmark app icon design from Classic Homescreen r=crdlc

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https://hg.mozilla.org/integration/gaia-central/rev/50bbd6dac902
Author: Julien Wajsberg <felash@gmail.com>
Desc: Merge pull request #20491 from julienw/fix-activity-test-newer-mocha

Bug 1024978 - [Messages] Activity Handler tests are failing with newer m...

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https://hg.mozilla.org/integration/gaia-central/rev/1a4372925fd6
Author: Julien Wajsberg <felash@gmail.com>
Desc: Bug 1024978 - [Messages] Activity Handler tests are failing with newer mocha r=azasypkin

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https://hg.mozilla.org/integration/gaia-central/rev/bd1e4ab0dc02
Author: Julien Wajsberg <felash@gmail.com>
Desc: Merge pull request #20578 from julienw/1022096-ellipsis-in-delete-mode

Bug 1022096 - [Messages] sms text truncated in delete messages mode r=az...

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https://hg.mozilla.org/integration/gaia-central/rev/b3d0a23b868a
Author: Julien Wajsberg <felash@gmail.com>
Desc: Bug 1022096 - [Messages] sms text truncated in delete messages mode r=azasypkin
Bumping manifests a=b2g-bump