core: fix format errors in debug output
core: fix format errors in debug output

authmillenon/RIOT,authmillenon/RIOT,BytesGalore/RIOT,RIOT-OS/RIOT,kbumsik/RIOT,kaspar030/RIOT,mfrey/RIOT,OlegHahm/RIOT,biboc/RIOT,toonst/RIOT,authmillenon/RIOT,avmelnikoff/RIOT,kaspar030/RIOT,neiljay/RIOT,miri64/RIOT,miri64/RIOT,LudwigKnuepfer/RIOT,cladmi/RIOT,A-Paul/RIOT,RIOT-OS/RIOT,josephnoir/RIOT,kYc0o/RIOT,x3ro/RIOT,aeneby/RIOT,mtausig/RIOT,basilfx/RIOT,aeneby/RIOT,lazytech-org/RIOT,OlegHahm/RIOT,josephnoir/RIOT,aeneby/RIOT,biboc/RIOT,A-Paul/RIOT,OlegHahm/RIOT,ant9000/RIOT,BytesGalore/RIOT,basilfx/RIOT,toonst/RIOT,LudwigOrtmann/RIOT,jasonatran/RIOT,authmillenon/RIOT,ant9000/RIOT,LudwigOrtmann/RIOT,basilfx/RIOT,cladmi/RIOT,x3ro/RIOT,authmillenon/RIOT,cladmi/RIOT,LudwigOrtmann/RIOT,kaspar030/RIOT,BytesGalore/RIOT,A-Paul/RIOT,jasonatran/RIOT,mtausig/RIOT,kYc0o/RIOT,rfuentess/RIOT,avmelnikoff/RIOT,gebart/RIOT,OTAkeys/RIOT,yogo1212/RIOT,avmelnikoff/RIOT,authmillenon/RIOT,smlng/RIOT,mfrey/RIOT,kbumsik/RIOT,RIOT-OS/RIOT,kbumsik/RIOT,smlng/RIOT,smlng/RIOT,x3ro/RIOT,yogo1212/RIOT,josephnoir/RIOT,mfrey/RIOT,basilfx/RIOT,jasonatran/RIOT,neiljay/RIOT,LudwigKnuepfer/RIOT,lazytech-org/RIOT,BytesGalore/RIOT,smlng/RIOT,x3ro/RIOT,avmelnikoff/RIOT,OTAkeys/RIOT,lazytech-org/RIOT,OlegHahm/RIOT,RIOT-OS/RIOT,yogo1212/RIOT,OlegHahm/RIOT,ant9000/RIOT,lazytech-org/RIOT,LudwigOrtmann/RIOT,biboc/RIOT,kYc0o/RIOT,jasonatran/RIOT,josephnoir/RIOT,mtausig/RIOT,yogo1212/RIOT,kaspar030/RIOT,josephnoir/RIOT,cladmi/RIOT,biboc/RIOT,yogo1212/RIOT,RIOT-OS/RIOT,neiljay/RIOT,kbumsik/RIOT,lazytech-org/RIOT,biboc/RIOT,cladmi/RIOT,LudwigKnuepfer/RIOT,A-Paul/RIOT,jasonatran/RIOT,ant9000/RIOT,gebart/RIOT,LudwigKnuepfer/RIOT,toonst/RIOT,BytesGalore/RIOT,smlng/RIOT,yogo1212/RIOT,kaspar030/RIOT,mtausig/RIOT,OTAkeys/RIOT,neiljay/RIOT,toonst/RIOT,LudwigOrtmann/RIOT,gebart/RIOT,ant9000/RIOT,miri64/RIOT,rfuentess/RIOT,OTAkeys/RIOT,miri64/RIOT,A-Paul/RIOT,LudwigKnuepfer/RIOT,kYc0o/RIOT,mfrey/RIOT,x3ro/RIOT,avmelnikoff/RIOT,miri64/RIOT,rfuentess/RIOT,gebart/RIOT,OTAkeys/RIOT,aeneby/RIOT,neiljay/RIOT,rfuentess/RIOT,basilfx/RIOT,gebart/RIOT,kYc0o/RIOT,rfuentess/RIOT,mfrey/RIOT,aeneby/RIOT,toonst/RIOT,mtausig/RIOT,LudwigOrtmann/RIOT,kbumsik/RIOT