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

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https://hg.mozilla.org/integration/gaia-central/rev/e0398f4fd796
Author: vingtetun <21@vingtetun.org>
Desc: Merge pull request #25089 from vingtetun/pulldown-try5

Bug 1061969 - [Camera] Pulling down the status bar while in the camera app is very sluggish

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https://hg.mozilla.org/integration/gaia-central/rev/7ce39601fd89
Author: Vivien Nicolas <vnicolas@mozilla.com>
Desc: Bug 1061969 - Set the app to inactive when the user interact with something else. r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/afff1ee04a44
Author: Vivien Nicolas <vnicolas@mozilla.com>
Desc: Bug 1061969 - Ensure the application priority is updated when the application is not visible for the screen reader. r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/3e076c76a13c
Author: Vivien Nicolas <vnicolas@mozilla.com>
Desc: Bug 1061969 - Do not forward events when the utility tray is opened. r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/b0be1edb1f7b
Author: Vivien Nicolas <vnicolas@mozilla.com>
Desc:  Bug 1061969 - Avoid extra repaints when showing the statusbar. r=cwiiis
Bumping manifests a=b2g-bump