The only way I found is quite awkward: get a live photo in the iCloud photo stream, and then connect your simulator to your iCloud account. Live photos will then be available in your photo lab for simulators.
As you might expect, the “get a live photo ...” step can be tricky - you may need a friend with the iPhone 6s / 6s + for iMessage. Although some services, such as Facebook and Google Photos, support viewing photos in real time in the application, they do not seem to support uploading them to their photo library, while preserving their living lives.
Palpatim
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