cmake HAVE_LINUX_FILTER_H examples

Tinob/Ishiiruka Externals/libusb/CMakeLists.txt :98 

check_include_files(linux/filter.h HAVE_LINUX_FILTER_H)

aidanmcb1/Citra externals/libusb/CMakeLists.txt :129 

check_include_files(linux/filter.h HAVE_LINUX_FILTER_H)