Fix for ROOT-6586 (ninja cannot properly clean)
Fix for ROOT-6586 (ninja cannot properly clean)

esakellari/root,agarciamontoro/root,sirinath/root,sirinath/root,karies/root,evgeny-boger/root,omazapa/root,Duraznos/root,gganis/root,gganis/root,zzxuanyuan/root-compressor-dummy,nilqed/root,abhinavmoudgil95/root,esakellari/my_root_for_test,krafczyk/root,gbitzes/root,Duraznos/root,sirinath/root,vukasinmilosevic/root,veprbl/root,gbitzes/root,Duraznos/root,vukasinmilosevic/root,jrtomps/root,sawenzel/root,BerserkerTroll/root,mkret2/root,simonpf/root,buuck/root,vukasinmilosevic/root,lgiommi/root,CristinaCristescu/root,beniz/root,evgeny-boger/root,mkret2/root,jrtomps/root,abhinavmoudgil95/root,sirinath/root,omazapa/root-old,abhinavmoudgil95/root,gbitzes/root,mattkretz/root,georgtroska/root,esakellari/root,perovic/root,zzxuanyuan/root,davidlt/root,krafczyk/root,CristinaCristescu/root,mhuwiler/rootauto,esakellari/root,CristinaCristescu/root,BerserkerTroll/root,olifre/root,agarciamontoro/root,Duraznos/root,thomaskeck/root,evgeny-boger/root,thomaskeck/root,sawenzel/root,CristinaCristescu/root,zzxuanyuan/root-compressor-dummy,pspe/root,omazapa/root,jrtomps/root,thomaskeck/root,dfunke/root,perovic/root,lgiommi/root,buuck/root,abhinavmoudgil95/root,veprbl/root,agarciamontoro/root,esakellari/my_root_for_test,sirinath/root,Y--/root,krafczyk/root,veprbl/root,simonpf/root,gganis/root,pspe/root,Y--/root,sawenzel/root,jrtomps/root,sbinet/cxx-root,BerserkerTroll/root,bbockelm/root,dfunke/root,gbitzes/root,bbockelm/root,karies/root,buuck/root,simonpf/root,simonpf/root,Y--/root,Y--/root,lgiommi/root,arch1tect0r/root,zzxuanyuan/root-compressor-dummy,sawenzel/root,vukasinmilosevic/root,georgtroska/root,mhuwiler/rootauto,omazapa/root,olifre/root,agarciamontoro/root,esakellari/root,lgiommi/root,Y--/root,buuck/root,buuck/root,abhinavmoudgil95/root,zzxuanyuan/root-compressor-dummy,omazapa/root,mattkretz/root,omazapa/root,thomaskeck/root,Y--/root,esakellari/root,vukasinmilosevic/root,mattkretz/root,beniz/root,abhinavmoudgil95/root,omazapa/root,gbitzes/root,bbockelm/root,omazapa/root-old,beniz/root,mattkretz/root,gganis/root,arch1tect0r/root,thomaskeck/root,beniz/root,pspe/root,krafczyk/root,mkret2/root,abhinavmoudgil95/root,beniz/root,dfunke/root,vukasinmilosevic/root,satyarth934/root,omazapa/root-old,georgtroska/root,davidlt/root,gganis/root,root-mirror/root,olifre/root,karies/root,georgtroska/root,georgtroska/root,nilqed/root,krafczyk/root,abhinavmoudgil95/root,nilqed/root,bbockelm/root,mkret2/root,Y--/root,CristinaCristescu/root,mkret2/root,jrtomps/root,agarciamontoro/root,bbockelm/root,perovic/root,perovic/root,esakellari/my_root_for_test,mhuwiler/rootauto,lgiommi/root,gbitzes/root,davidlt/root,sawenzel/root,veprbl/root,pspe/root,dfunke/root,evgeny-boger/root,olifre/root,mhuwiler/rootauto,krafczyk/root,thomaskeck/root,bbockelm/root,pspe/root,sawenzel/root,Duraznos/root,davidlt/root,Duraznos/root,lgiommi/root,root-mirror/root,pspe/root,satyarth934/root,nilqed/root,satyarth934/root,sawenzel/root,simonpf/root,sawenzel/root,zzxuanyuan/root,agarciamontoro/root,zzxuanyuan/root,veprbl/root,vukasinmilosevic/root,georgtroska/root,karies/root,abhinavmoudgil95/root,krafczyk/root,BerserkerTroll/root,mhuwiler/rootauto,omazapa/root,gganis/root,karies/root,omazapa/root-old,root-mirror/root,agarciamontoro/root,krafczyk/root,arch1tect0r/root,bbockelm/root,dfunke/root,nilqed/root,mhuwiler/rootauto,olifre/root,lgiommi/root,sbinet/cxx-root,olifre/root,CristinaCristescu/root,mhuwiler/rootauto,perovic/root,mkret2/root,omazapa/root-old,CristinaCristescu/root,veprbl/root,sbinet/cxx-root,omazapa/root-old,root-mirror/root,mhuwiler/rootauto,thomaskeck/root,jrtomps/root,sbinet/cxx-root,abhinavmoudgil95/root,gganis/root,arch1tect0r/root,Y--/root,veprbl/root,davidlt/root,zzxuanyuan/root-compressor-dummy,davidlt/root,arch1tect0r/root,CristinaCristescu/root,sbinet/cxx-root,jrtomps/root,gbitzes/root,nilqed/root,omazapa/root,evgeny-boger/root,sirinath/root,beniz/root,satyarth934/root,omazapa/root-old,root-mirror/root,georgtroska/root,zzxuanyuan/root,mkret2/root,zzxuanyuan/root-compressor-dummy,BerserkerTroll/root,nilqed/root,esakellari/my_root_for_test,CristinaCristescu/root,sbinet/cxx-root,dfunke/root,mhuwiler/rootauto,satyarth934/root,thomaskeck/root,esakellari/my_root_for_test,simonpf/root,bbockelm/root,arch1tect0r/root,Y--/root,jrtomps/root,davidlt/root,karies/root,mkret2/root,zzxuanyuan/root-compressor-dummy,perovic/root,esakellari/my_root_for_test,agarciamontoro/root,pspe/root,sbinet/cxx-root,Duraznos/root,jrtomps/root,veprbl/root,georgtroska/root,sawenzel/root,olifre/root,zzxuanyuan/root-compressor-dummy,mhuwiler/rootauto,gbitzes/root,zzxuanyuan/root,evgeny-boger/root,mattkretz/root,agarciamontoro/root,sbinet/cxx-root,buuck/root,perovic/root,arch1tect0r/root,pspe/root,bbockelm/root,root-mirror/root,nilqed/root,gganis/root,esakellari/my_root_for_test,nilqed/root,karies/root,Duraznos/root,thomaskeck/root,sbinet/cxx-root,dfunke/root,mattkretz/root,evgeny-boger/root,vukasinmilosevic/root,zzxuanyuan/root-compressor-dummy,gganis/root,satyarth934/root,sirinath/root,davidlt/root,vukasinmilosevic/root,simonpf/root,Y--/root,Duraznos/root,agarciamontoro/root,zzxuanyuan/root,omazapa/root-old,omazapa/root,krafczyk/root,beniz/root,dfunke/root,CristinaCristescu/root,georgtroska/root,esakellari/root,zzxuanyuan/root,mattkretz/root,mattkretz/root,mattkretz/root,veprbl/root,Duraznos/root,BerserkerTroll/root,evgeny-boger/root,mkret2/root,simonpf/root,omazapa/root-old,beniz/root,karies/root,zzxuanyuan/root,mattkretz/root,buuck/root,buuck/root,davidlt/root,krafczyk/root,BerserkerTroll/root,evgeny-boger/root,karies/root,zzxuanyuan/root,veprbl/root,olifre/root,BerserkerTroll/root,zzxuanyuan/root-compressor-dummy,pspe/root,perovic/root,davidlt/root,buuck/root,lgiommi/root,gganis/root,perovic/root,thomaskeck/root,root-mirror/root,abhinavmoudgil95/root,zzxuanyuan/root-compressor-dummy,omazapa/root-old,arch1tect0r/root,sbinet/cxx-root,lgiommi/root,krafczyk/root,satyarth934/root,sirinath/root,Y--/root,esakellari/root,esakellari/root,lgiommi/root,perovic/root,mkret2/root,lgiommi/root,zzxuanyuan/root,evgeny-boger/root,karies/root,georgtroska/root,gbitzes/root,veprbl/root,jrtomps/root,satyarth934/root,simonpf/root,beniz/root,jrtomps/root,sbinet/cxx-root,CristinaCristescu/root,pspe/root,vukasinmilosevic/root,buuck/root,sirinath/root,davidlt/root,beniz/root,zzxuanyuan/root,esakellari/my_root_for_test,satyarth934/root,sawenzel/root,buuck/root,georgtroska/root,vukasinmilosevic/root,root-mirror/root,olifre/root,beniz/root,gbitzes/root,mkret2/root,esakellari/root,esakellari/my_root_for_test,karies/root,Duraznos/root,root-mirror/root,satyarth934/root,simonpf/root,gbitzes/root,omazapa/root-old,mattkretz/root,olifre/root,BerserkerTroll/root,arch1tect0r/root,simonpf/root,arch1tect0r/root,dfunke/root,pspe/root,perovic/root,satyarth934/root,dfunke/root,sirinath/root,gganis/root,omazapa/root,esakellari/root,bbockelm/root,esakellari/my_root_for_test,mhuwiler/rootauto,bbockelm/root,sirinath/root,arch1tect0r/root,nilqed/root,BerserkerTroll/root,root-mirror/root,omazapa/root,agarciamontoro/root,BerserkerTroll/root,zzxuanyuan/root,root-mirror/root,nilqed/root,dfunke/root,olifre/root,sawenzel/root,esakellari/root,evgeny-boger/root