openthread: blacklist LLVM/clang
openthread: blacklist LLVM/clang

There is a problem with ranlib and LLVM/clang in this package

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