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

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

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https://hg.mozilla.org/integration/gaia-2_2/rev/8d794983f11a
Author: Gabriele Svelto <gsvelto@mozilla.com>
Desc: Bug 1155582 - Sync the phone and email details fragments used when displaying a contact in the call log information pane r=drs,francisco

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https://hg.mozilla.org/integration/gaia-2_2/rev/de36c51c75e8
Author: Sean Lee <selee@mozilla.com>
Desc: Bug 1154649 - Switch transition property when entering/leaving edit-mode.

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https://hg.mozilla.org/integration/gaia-2_2/rev/06b2dd1752e4
Author: Guillaume Marty <edo999@gmail.com>
Desc: Bug 1157630 - [Flame][E.me Integration] Status bar will not disappear on screenshot preview page

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https://hg.mozilla.org/integration/gaia-2_2/rev/88cf872b1230
Author: Ricky Chien <ricky060709@gmail.com>
Desc: Bug 1156161 - Add manifestHash and packageHash fields in webapps.json

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https://hg.mozilla.org/integration/gaia-2_2/rev/9ea8a2426ded
Author: Russ Nicoletti <rnicoletti@mozilla.com>
Desc: Bug 1151775 - [Flame][Video]Share a video to mail/Messages and then back to Video, the video can't be played

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https://hg.mozilla.org/integration/gaia-2_2/rev/894a72ab9546
Author: Francesco Lodolo (:flod) <flod@lodolo.net>
Desc: Bug 1155105 - [Settings] Use l10n.js to localize time selector text in "Date&Time" panel

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https://hg.mozilla.org/integration/gaia-2_2/rev/0d0b22da4214
Author: Chris Lord <chrislord.net@gmail.com>
Desc: Bug 1151081 - Fix buggy value selector appearing transition. r=alive

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https://hg.mozilla.org/integration/gaia-2_2/rev/5d25d9a944eb
Author: Frederik Braun <fbraun+gh@mozilla.com>
Desc: Bug 1147862 - FindMyDevice should use the ringer audio context type