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

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https://hg.mozilla.org/integration/gaia-central/rev/ba48614feb05
Author: lissyx <lissyx+github@lissyx.dyndns.org>
Desc: Merge pull request #18143 from lissyx/bug994262

Bug 994262 - Make sure ModalDialog has title set r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/25dd42e4b5e0
Author: Alexandre Lissy <lissyx+github@lissyx.dyndns.org>
Desc: Bug 994262 - Make sure ModalDialog has title set

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https://hg.mozilla.org/integration/gaia-central/rev/bfd10421bf85
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #18147 from alivedise/bugzilla/994527/return-self-in-permission-manager-start

Bug 994527 - fix undefined permissionManager, r=timdream

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https://hg.mozilla.org/integration/gaia-central/rev/53f1f4c19615
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 994527 - Fix undefined permissionManager

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https://hg.mozilla.org/integration/gaia-central/rev/5225d11e62bb
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Merge pull request #18048 from mikehenrty/bug-987458-queuemozapps

Bug 987458 - [B2G][Calendar] Only one alarm will fire and only one notif...

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https://hg.mozilla.org/integration/gaia-central/rev/2c5cb82162fa
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Bug 987458 - [B2G][Calendar] Only one alarm will fire and only one notification displays if there are two events with alarms scheduled to fire at the same time
Bumping manifests a=b2g-bump