Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_4/rev/d06d740426f9
Author: Sergi Mansilla <sergi.mansilla@gmail.com>
Desc: Merge pull request #17075 from sergi/981989

Bug 981989 - [DSDS] Fixed dialing numbers page is not separated for 2 SIM card, which means that if set SIM 1 to enabled, same page of SIM 2 will become enabled as well even it's disabled in Call settings.

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https://hg.mozilla.org/integration/gaia-1_4/rev/b629ea649675
Author: Amir Nissim <amirnissim@gmail.com>
Desc: Merge pull request #17781 from EverythingMe/989722-dnd-cleanup

Bug 989722 - Draggable element in Collection is not cleared after dragen...

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https://hg.mozilla.org/integration/gaia-1_4/rev/81786385f5b5
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #17241 from crdlc/bug-983594

Bug 983594 - Avoid making several calls from detail view at the same tim...

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https://hg.mozilla.org/integration/gaia-1_4/rev/f215f2b9629d
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #17503 from alivedise/bugzilla/970028_master_v2/nicer-activity-animation

Bug 970028 - Nicer activity opener animation
Bumping manifests a=b2g-bump