libusb: rename to libusb-legacy

git-svn-id: svn://svn.openwrt.org/openwrt/packages@35372 3c298f89-4303-0410-b956-a3cf2f4a3e73
libusb-1.0, usbutils: remove (moved to trunk)

git-svn-id: svn://svn.openwrt.org/openwrt/packages@35376 3c298f89-4303-0410-b956-a3cf2f4a3e73