Bumping gaia.json for 8 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/db447ed53ecb
Author: Carsten Book <tomcat@mozilla.com>
Desc: Merge pull request #25017 from mancas/bug1080253

Bug 1080253 - notification count is wrong. r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/e33185741be9
Author: Manuel Casas Barrado <manuel.casasbarrado@telefonica.com>
Desc: Bug 1080253 - notification count is wrong.r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/9e9806a853ae
Author: Carsten Book <tomcat@mozilla.com>
Desc: Merge pull request #24949 from ochameau/fixDownload

Bug 1079138 - Fix addon download by using nsIDownloader. r=gduan

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https://hg.mozilla.org/integration/gaia-central/rev/7a1a9a303246
Author: Alexandre Poirot <poirot.alex@gmail.com>
Desc: Bug 1079138 - Fix addon download by using nsIDownloader. r=gduan

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https://hg.mozilla.org/integration/gaia-central/rev/2b2fd3d8bc0e
Author: Carsten Book <tomcat@mozilla.com>
Desc: Merge pull request #24945 from ochameau/bug1074200

Bug 1074200 - Ensure that build fails when an exception happens. r=gduan

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https://hg.mozilla.org/integration/gaia-central/rev/7ddaa09c1948
Author: Alexandre Poirot <poirot.alex@gmail.com>
Desc: Bug 1074200 - Ensure that build fails when an exception happens. r=gduan

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https://hg.mozilla.org/integration/gaia-central/rev/35e06f3a6f58
Author: Carsten Book <tomcat@mozilla.com>
Desc: Merge pull request #24672 from sv99/1070681

Bug 1070681 - [communications] unit test refactoring for new version chai.assert api (rebased). r=francisco

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https://hg.mozilla.org/integration/gaia-central/rev/3343d67f46fb
Author: sv99 <sv99@inbox.ru>
Desc: Bug 1070681 - [communications] unit test refactoring for new version chai.assert api
Bumping manifests a=b2g-bump