Makefile: add APPLICATION to macro defines
Makefile: add APPLICATION to macro defines

This allows the application code to know what application it is running

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