qiprog_usb_dev.h: Include qiprog_usb.h, not qiprog.h (Trivial)

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
libqiprog: Add preliminary command translator for QiProg slaves

This is the module that runs on the QiProg device, handles USB requests,
and converts them into QiProg calls which are executed on the device. This
module is transparent to the host.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>