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

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https://hg.mozilla.org/integration/gaia-central/rev/bb35a32f9408
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #15764 from alivedise/bugzilla/956938/fix-activie-activity

Bug 956938 - Fix active activity

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https://hg.mozilla.org/integration/gaia-central/rev/cdc361479f9f
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 956938 - Fix active activity

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https://hg.mozilla.org/integration/gaia-central/rev/ba368558401f
Author: Greg Weng <snowmantw@gmail.com>
Desc: Merge pull request #15714 from snowmantw/issue963503

Bug 963503 - [NFC] Shrink UI Type Error in AppFrame in Shrinking_ui.js

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https://hg.mozilla.org/integration/gaia-central/rev/0ba8b2419a8a
Author: Greg Weng <snowmantw@gmail.com>
Desc: Bug 963503 - [NFC] Shrink UI Type Error in AppFrame in Shrinking_ui.js

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https://hg.mozilla.org/integration/gaia-central/rev/a85e75fcf77f
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #15696 from etiennesegonzac/bug-963723-home-gesture-reboot

Bug 963723 - On startup, software home button should not be enabled if home gesture is enabled. r=alive,etienne

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https://hg.mozilla.org/integration/gaia-central/rev/e626fd18d20d
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 963723 - On startup, software home button should not be enabled if home gesture is enabled.
Bumping manifests a=b2g-bump