Revert "Check new GCC ABI in configure step and eventually fail configuration"
Revert "Check new GCC ABI in configure step and eventually fail configuration"

GCC5 ABI patch is in.
This reverts commit 9c2b6c38566283e573f500974a9b3e64787e2f13.

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