Add pmb:cross-native/!tracedeps to applicable firmware packages and
secure both with a test.
This sets the pmb:cross-native and !tracedeps options on all firmware-*
packages that are compatible with the native compilation method. A unit
test ensures the presence of both options while maintaining a list of
exempted packages.
Fixes: #718
[ci:ignore-count] [ci:skip-vercheck] [ci:skip-build]
New mainline port with most things working (usb/wifi/bt/3d-accel/sound/gps).
Modem/calls/sms/mobile-data should work but couldn't test it recently
due to broken devices.
