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

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https://hg.mozilla.org/integration/gaia-central/rev/c8cf75e02acb
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #21575 from crdlc/bug-1036336

Bug 1036336 - [Collection App] Icons jump after rendering all of them

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https://hg.mozilla.org/integration/gaia-central/rev/7bc977a7fef8
Author: crdlc <crdlc@tid.es>
Desc: Bug 1036336 - [Collection App] Icons jump after rendering all of them

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https://hg.mozilla.org/integration/gaia-central/rev/67b3a1c8ae3d
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #21161 from crdlc/bug-1031254

Bug 1031254 - [Vertical Homescreen] Add configure button in context menu

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https://hg.mozilla.org/integration/gaia-central/rev/07324d152174
Author: crdlc <crdlc@tid.es>
Desc: Bug 1031254 - [Vertical Homescreen] Add configure button in context menu

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https://hg.mozilla.org/integration/gaia-central/rev/8399ff794e75
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #21533 from crdlc/bug-1036359

Bug 1036359 - After clicking on "save bookmark" button there is a javasc...

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https://hg.mozilla.org/integration/gaia-central/rev/b74aea827fcf
Author: crdlc <crdlc@tid.es>
Desc: Bug 1036359 - After clicking on "save bookmark" button there is a javascript error
Bumping manifests a=b2g-bump