cmake HAVE_LIBUSB examples

ovsky/sumi-emu src/input_common/CMakeLists.txt :86 

target_compile_definitions(input_common PRIVATE HAVE_LIBUSB)

webcamoid/webcamoid libAvKys/Plugins/VideoCapture/src/capture/v4l2sys/CMakeLists.txt :124 

add_definitions(-DHAVE_LIBUSB)

webcamoid/webcamoid libAvKys/Plugins/VideoCapture/src/capture/v4lutils/CMakeLists.txt :136 

add_definitions(-DHAVE_LIBUSB)