usb_cdc: Add common defines and message structs
usb_cdc: Add common defines and message structs

josephnoir/RIOT,toonst/RIOT,RIOT-OS/RIOT,OlegHahm/RIOT,mtausig/RIOT,josephnoir/RIOT,aeneby/RIOT,smlng/RIOT,yogo1212/RIOT,kYc0o/RIOT,toonst/RIOT,josephnoir/RIOT,kaspar030/RIOT,kYc0o/RIOT,cladmi/RIOT,smlng/RIOT,rfuentess/RIOT,toonst/RIOT,ant9000/RIOT,kYc0o/RIOT,mtausig/RIOT,miri64/RIOT,authmillenon/RIOT,yogo1212/RIOT,x3ro/RIOT,OTAkeys/RIOT,OlegHahm/RIOT,josephnoir/RIOT,authmillenon/RIOT,x3ro/RIOT,authmillenon/RIOT,smlng/RIOT,aeneby/RIOT,yogo1212/RIOT,cladmi/RIOT,toonst/RIOT,ant9000/RIOT,basilfx/RIOT,mtausig/RIOT,smlng/RIOT,rfuentess/RIOT,OTAkeys/RIOT,cladmi/RIOT,basilfx/RIOT,OlegHahm/RIOT,OTAkeys/RIOT,kYc0o/RIOT,yogo1212/RIOT,aeneby/RIOT,cladmi/RIOT,yogo1212/RIOT,jasonatran/RIOT,kaspar030/RIOT,miri64/RIOT,x3ro/RIOT,miri64/RIOT,kaspar030/RIOT,ant9000/RIOT,authmillenon/RIOT,kYc0o/RIOT,rfuentess/RIOT,OTAkeys/RIOT,rfuentess/RIOT,RIOT-OS/RIOT,cladmi/RIOT,ant9000/RIOT,OTAkeys/RIOT,basilfx/RIOT,jasonatran/RIOT,josephnoir/RIOT,mtausig/RIOT,rfuentess/RIOT,basilfx/RIOT,mtausig/RIOT,smlng/RIOT,x3ro/RIOT,kaspar030/RIOT,miri64/RIOT,jasonatran/RIOT,OlegHahm/RIOT,x3ro/RIOT,ant9000/RIOT,RIOT-OS/RIOT,miri64/RIOT,kaspar030/RIOT,RIOT-OS/RIOT,aeneby/RIOT,RIOT-OS/RIOT,OlegHahm/RIOT,basilfx/RIOT,jasonatran/RIOT,aeneby/RIOT,authmillenon/RIOT,toonst/RIOT,authmillenon/RIOT,jasonatran/RIOT,yogo1212/RIOT