usb-modeswitch: add from /packages, merge usb-modeswitch-data, use libusb-compat, add myself as maintainer

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35379 3c298f89-4303-0410-b956-a3cf2f4a3e73
usb-modeswitch: split out usb-modeswitch-data again

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35381 3c298f89-4303-0410-b956-a3cf2f4a3e73