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

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https://hg.mozilla.org/integration/gaia-central/rev/9a59e0c949e7
Author: GaryChen(pychen) <mmm198219@gmail.com>
Desc: Merge pull request #17180 from mpizza/Bug_983508_build_system_get_wrong_path

Bug 983508 - [Build System] install-test-media get wrong "Pictures" path. r=yuren.

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https://hg.mozilla.org/integration/gaia-central/rev/d6ae4b8f725c
Author: mpizza <mmm198219@gmail.com>
Desc: Bug 983508 - [Build System] install-test-media get wrong "Pictures" path

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https://hg.mozilla.org/integration/gaia-central/rev/a84df805cba2
Author: vingtetun <21@vingtetun.org>
Desc: Merge pull request #17194 from vingtetun/bug978067-landing

Bug 978067 - [Call Log] Remove position: sticky as it hurts scrolling pe...

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https://hg.mozilla.org/integration/gaia-central/rev/8444b9cfd599
Author: Vivien Nicolas <21@vingtetun.org>
Desc: Bug 978067 - [Call Log] Remove position: sticky as it hurts scrolling performance. r=Rik

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https://hg.mozilla.org/integration/gaia-central/rev/02e0c85507df
Author: vingtetun <21@vingtetun.org>
Desc: Merge pull request #17193 from vingtetun/bug977680-landing

Bug 977680 - [Messages] Remove position: sticky as it hurts scrolling pe...

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https://hg.mozilla.org/integration/gaia-central/rev/79d1e7f6f785
Author: Vivien Nicolas <21@vingtetun.org>
Desc: Bug 977680 - [Messages] Remove position: sticky as it hurts scrolling performance. r=kgrandon, f=felash
Bumping manifests a=b2g-bump