libjaylink: Update for API changes

Update to latest libjaylink version and incorporate API changes.

The major change in libjaylink is a rework of the device discovery.
Please test device discovery extensively, especially with multiple
devices connected. All other changes in libjaylink are of minor
importance for OpenOCD.

Change-Id: I9a50e83f59557505ce29809c7762c5df1cec10eb
Signed-off-by: Marc Schink <openocd-dev@marcschink.de>
Reviewed-on: http://openocd.zylin.com/3735


Reviewed-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Steven Stallion <stallion@squareup.com>
Tested-by: jenkins
Reviewed-by: Paul Fertser <fercerpav@gmail.com>