cmake Libusb1 examples

OSVR/OSVR-Core CMakeLists.txt :114 

find_package(Libusb1)

supertuxkart/stk-code lib/wiiuse/cmake/FindVRPN.cmake :119 

find_package(Libusb1 QUIET)

shawwn/noh cmake/FindVRPN.cmake :120 

find_package(Libusb1 QUIET)

ucla-vision/xivo thirdparty/Pangolin/src/CMakeLists.txt :479 

find_package(libusb1 REQUIRED QUIET)

vrpn/vrpn CMakeLists.txt :412 

find_package(Libusb1 ${QUIET_IF_SUBPROJECT})