libdivecomputer asks pkg-config for the include paths for libusb-1.0 and
hidapi, but then uses #include <libusb-1.0/libusb.h> and <hidapi/hidapi.h>
which fails as those directories are part of the include path. So we
manually add include paths without that last directory as well as a work
around.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>