libusb-1.0 deprecated calls

[nealey]

As reported by Dmytro Vladimirov:

$ make clean all DEBUG=1
rm -f hdjd explore *.o
cc -Wall -Werror -g -DDEBUG -c -o hdjd.o hdjd.c
cc -Wall -Werror -g -DDEBUG -I/usr/include/libusb-1.0 -c -o usb.o usb.c
usb.c: In function ‘usb_setup’:
usb.c:154:3: error: ‘libusb_set_debug’ is deprecated: Use libusb_set_option instead [-Werror=deprecated-declarations]
154 | libusb_set_debug(context, LIBUSB_LOG_LEVEL_WARNING);
| ^~~~~~~~~~~~~~~~
In file included from usb.c:1:
/usr/include/libusb-1.0/libusb.h:1362:18: note: declared here
1362 | void LIBUSB_CALL libusb_set_debug(libusb_context *ctx, int level);
| ^~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make: *** [<builtin>: usb.o] Error 1

It seems we need to switch to libusb_set_option and stop using libusb_set_debug.

As a workaround, you can remove -Werror in the Makefile.