FreeBSD installs its libusb-1.0 libusb.h implementation in /usr/include. libmtp uses pkg-config to discover it which adds the correct -I flag, so just #include libusb.h to make it work with every implementation.
FreeBSD installs its libusb-1.0 libusb.h implementation in
/usr/include. libmtp uses pkg-config to discover it which adds
the correct -I flag, so just #include libusb.h to make it
work with every implementation.

Signed-off-by: Linus Walleij <67b0e6e4a7f8300bccd309fb10a9106ef3d7b5b0@df.lth.se>

jemc/libmtp,philipl/libmtp,reverendhomer/libmtp,reverendhomer/libmtp,mmalecki/libmtp,libmtp/libmtp,mmalecki/libmtp,jemc/libmtp,libmtp/libmtp,philipl/libmtp,jemc/libmtp,philipl/libmtp,reverendhomer/libmtp,olunx/libmtp,libmtp/libmtp,olunx/libmtp,jemc/libmtp,mmalecki/libmtp,olunx/libmtp,reverendhomer/libmtp