cmake: set correct ROOT_ARCHITECTURE on PPC64LE, linuxppc64gcc
cmake: set correct ROOT_ARCHITECTURE on PPC64LE, linuxppc64gcc

ROOT_ARCHITECTURE is linuxppc64gcc instead of ppc64le. linuxppc64gcc is
used on various CMake and Makefile files for a long time already.

Signed-off-by: David Abdurachmanov <3747debe97ca693bc6b62ba4169dd2a50fce172c@cern.ch>

sirinath/root,olifre/root,zzxuanyuan/root,lgiommi/root,abhinavmoudgil95/root,buuck/root,olifre/root,thomaskeck/root,gbitzes/root,Y--/root,BerserkerTroll/root,esakellari/root,jrtomps/root,bbockelm/root,mkret2/root,georgtroska/root,veprbl/root,abhinavmoudgil95/root,root-mirror/root,BerserkerTroll/root,root-mirror/root,Y--/root,satyarth934/root,esakellari/root,krafczyk/root,abhinavmoudgil95/root,lgiommi/root,zzxuanyuan/root,sirinath/root,mhuwiler/rootauto,beniz/root,sirinath/root,bbockelm/root,pspe/root,davidlt/root,sawenzel/root,esakellari/root,satyarth934/root,satyarth934/root,CristinaCristescu/root,sawenzel/root,BerserkerTroll/root,gganis/root,gbitzes/root,davidlt/root,buuck/root,karies/root,agarciamontoro/root,esakellari/root,krafczyk/root,bbockelm/root,sirinath/root,olifre/root,lgiommi/root,Y--/root,bbockelm/root,karies/root,BerserkerTroll/root,pspe/root,zzxuanyuan/root,pspe/root,agarciamontoro/root,agarciamontoro/root,veprbl/root,mkret2/root,mhuwiler/rootauto,root-mirror/root,gganis/root,georgtroska/root,beniz/root,zzxuanyuan/root-compressor-dummy,satyarth934/root,zzxuanyuan/root,mhuwiler/rootauto,jrtomps/root,esakellari/root,abhinavmoudgil95/root,root-mirror/root,bbockelm/root,beniz/root,mkret2/root,CristinaCristescu/root,esakellari/root,karies/root,BerserkerTroll/root,pspe/root,buuck/root,thomaskeck/root,gganis/root,karies/root,davidlt/root,zzxuanyuan/root-compressor-dummy,lgiommi/root,karies/root,jrtomps/root,Y--/root,sawenzel/root,mattkretz/root,mkret2/root,karies/root,veprbl/root,gbitzes/root,thomaskeck/root,krafczyk/root,lgiommi/root,simonpf/root,thomaskeck/root,bbockelm/root,gbitzes/root,veprbl/root,bbockelm/root,Y--/root,BerserkerTroll/root,mattkretz/root,root-mirror/root,gganis/root,satyarth934/root,buuck/root,krafczyk/root,abhinavmoudgil95/root,abhinavmoudgil95/root,beniz/root,davidlt/root,buuck/root,pspe/root,bbockelm/root,root-mirror/root,zzxuanyuan/root-compressor-dummy,gganis/root,zzxuanyuan/root,sawenzel/root,zzxuanyuan/root-compressor-dummy,lgiommi/root,CristinaCristescu/root,mhuwiler/rootauto,buuck/root,gganis/root,simonpf/root,sirinath/root,root-mirror/root,CristinaCristescu/root,zzxuanyuan/root,sawenzel/root,mhuwiler/rootauto,mkret2/root,mkret2/root,veprbl/root,bbockelm/root,davidlt/root,lgiommi/root,mhuwiler/rootauto,CristinaCristescu/root,gbitzes/root,simonpf/root,simonpf/root,pspe/root,CristinaCristescu/root,agarciamontoro/root,veprbl/root,BerserkerTroll/root,lgiommi/root,buuck/root,mhuwiler/rootauto,zzxuanyuan/root-compressor-dummy,agarciamontoro/root,Y--/root,mattkretz/root,krafczyk/root,thomaskeck/root,Y--/root,olifre/root,sawenzel/root,beniz/root,davidlt/root,beniz/root,abhinavmoudgil95/root,davidlt/root,zzxuanyuan/root-compressor-dummy,karies/root,satyarth934/root,zzxuanyuan/root,lgiommi/root,BerserkerTroll/root,davidlt/root,simonpf/root,mkret2/root,mattkretz/root,davidlt/root,thomaskeck/root,BerserkerTroll/root,gbitzes/root,CristinaCristescu/root,CristinaCristescu/root,gganis/root,zzxuanyuan/root-compressor-dummy,gganis/root,beniz/root,georgtroska/root,gganis/root,zzxuanyuan/root-compressor-dummy,root-mirror/root,gganis/root,zzxuanyuan/root,pspe/root,jrtomps/root,georgtroska/root,esakellari/root,satyarth934/root,davidlt/root,esakellari/root,buuck/root,mattkretz/root,jrtomps/root,veprbl/root,gbitzes/root,mhuwiler/rootauto,sirinath/root,georgtroska/root,karies/root,sirinath/root,mattkretz/root,georgtroska/root,Y--/root,pspe/root,zzxuanyuan/root-compressor-dummy,CristinaCristescu/root,agarciamontoro/root,lgiommi/root,gbitzes/root,beniz/root,krafczyk/root,buuck/root,karies/root,zzxuanyuan/root-compressor-dummy,agarciamontoro/root,jrtomps/root,zzxuanyuan/root-compressor-dummy,buuck/root,krafczyk/root,mattkretz/root,esakellari/root,mattkretz/root,georgtroska/root,satyarth934/root,olifre/root,mattkretz/root,simonpf/root,mhuwiler/rootauto,root-mirror/root,jrtomps/root,mattkretz/root,agarciamontoro/root,gganis/root,mkret2/root,thomaskeck/root,pspe/root,beniz/root,olifre/root,sirinath/root,gbitzes/root,Y--/root,olifre/root,jrtomps/root,sawenzel/root,jrtomps/root,CristinaCristescu/root,beniz/root,georgtroska/root,simonpf/root,olifre/root,lgiommi/root,georgtroska/root,zzxuanyuan/root,veprbl/root,thomaskeck/root,olifre/root,mkret2/root,zzxuanyuan/root,zzxuanyuan/root,mhuwiler/rootauto,esakellari/root,bbockelm/root,simonpf/root,sawenzel/root,karies/root,beniz/root,pspe/root,CristinaCristescu/root,esakellari/root,thomaskeck/root,jrtomps/root,simonpf/root,georgtroska/root,simonpf/root,abhinavmoudgil95/root,mkret2/root,abhinavmoudgil95/root,krafczyk/root,zzxuanyuan/root,pspe/root,sawenzel/root,agarciamontoro/root,thomaskeck/root,mhuwiler/rootauto,bbockelm/root,veprbl/root,sirinath/root,olifre/root,gbitzes/root,veprbl/root,sawenzel/root,krafczyk/root,krafczyk/root,georgtroska/root,olifre/root,veprbl/root,satyarth934/root,jrtomps/root,mkret2/root,sawenzel/root,krafczyk/root,abhinavmoudgil95/root,root-mirror/root,Y--/root,agarciamontoro/root,satyarth934/root,gbitzes/root,sirinath/root,agarciamontoro/root,satyarth934/root,simonpf/root,abhinavmoudgil95/root,mattkretz/root,buuck/root,BerserkerTroll/root,root-mirror/root,davidlt/root,karies/root,BerserkerTroll/root,sirinath/root,Y--/root