This Udev rule marks the device to be ignored by the MM.
Otherwise using the CDC ACM serial port interface will not be
possible, while its service is running.
Tested on Fedora 29, with ModemManager enabled, using:
$ solotool.py monitor /dev/solokey-serial
Fixes https://github.com/solokeys/solo/issues/62
As provided by @yparitcher in:
https://github.com/solokeys/solo/pull/60#issuecomment-452428432
Signed-off-by: Szczepan Zalega <szczepan@nitrokey.com>
