libftdi: Add 'flossjtag' cable.
libftdi: Clean up warnings.
Add missing #includes
native: Fix up deprecated warnings.
Adapt Gareth McMullin <gareth@motrr.com>: Allow extra LDFLAGS on command line.  Use nano.specs for swlink.
Remove DFU bootloader self protection.

It can still be enabled by building with -DDFU_SELF_PROTECT