Add --prefix=/usr to autogen.sh
Add --prefix=/usr to autogen.sh

Signed-off-by: David Herrmann <fb53b2ddb8d141e0cb39d7c67c2f81b6bc2eb0f7@googlemail.com>

dvdhrm/xwiimote,AdamLuchjenbroers/xwiimote,barracks510/xwiimote,barracks510/xwiimote,dvdhrm/xwiimote,barracks510/xwiimote,barracks510/xwiimote,AdamLuchjenbroers/xwiimote