Bumping gaia.json for 5 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/380144f47633
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Merge pull request #20498 from Rik/csslint-in-travis

Bug 1024993 -  Run the CSS Linter in Travis/TBPL r=vingtetun

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https://hg.mozilla.org/integration/gaia-central/rev/569fb1a5e8c9
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Bug 1024993 - Update CSS xfail list to be green

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https://hg.mozilla.org/integration/gaia-central/rev/28efbc64590b
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Bug 1024993 -  Run the CSS Linter in Travis/TBPL

Refactor the script to only report unknown problems

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https://hg.mozilla.org/integration/gaia-central/rev/076de6f4e3ac
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #20812 from anefzaoui/bug-1022429

Bug 1022429 - [Homescreen] Flatter design for notification tray.

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https://hg.mozilla.org/integration/gaia-central/rev/36623296876c
Author: Ahmed Nefzaoui <nefzaoui.ahmed@hotmail.com>
Desc: Bug 1022429 - [Homescreen] Flatter design for notification tray.
Bumping manifests a=b2g-bump