Support new name of std::string in libc++.
Support new name of std::string in libc++.

krafczyk/root,pspe/root,simonpf/root,bbockelm/root,krafczyk/root,mkret2/root,arch1tect0r/root,nilqed/root,bbockelm/root,veprbl/root,buuck/root,buuck/root,agarciamontoro/root,gbitzes/root,root-mirror/root,karies/root,gganis/root,gbitzes/root,esakellari/root,krafczyk/root,veprbl/root,root-mirror/root,Y--/root,abhinavmoudgil95/root,mhuwiler/rootauto,olifre/root,georgtroska/root,BerserkerTroll/root,Y--/root,esakellari/root,sbinet/cxx-root,jrtomps/root,smarinac/root,zzxuanyuan/root,mhuwiler/rootauto,karies/root,jrtomps/root,lgiommi/root,abhinavmoudgil95/root,gganis/root,davidlt/root,CristinaCristescu/root,satyarth934/root,Duraznos/root,gbitzes/root,mhuwiler/rootauto,satyarth934/root,lgiommi/root,olifre/root,pspe/root,pspe/root,jrtomps/root,jrtomps/root,gganis/root,omazapa/root-old,sirinath/root,CristinaCristescu/root,root-mirror/root,mattkretz/root,sirinath/root,karies/root,krafczyk/root,evgeny-boger/root,sbinet/cxx-root,davidlt/root,omazapa/root,sirinath/root,CristinaCristescu/root,zzxuanyuan/root-compressor-dummy,gganis/root,smarinac/root,0x0all/ROOT,abhinavmoudgil95/root,thomaskeck/root,pspe/root,vukasinmilosevic/root,jrtomps/root,0x0all/ROOT,mhuwiler/rootauto,abhinavmoudgil95/root,evgeny-boger/root,esakellari/my_root_for_test,BerserkerTroll/root,gganis/root,karies/root,nilqed/root,omazapa/root-old,mkret2/root,beniz/root,root-mirror/root,gganis/root,davidlt/root,thomaskeck/root,gbitzes/root,sbinet/cxx-root,sbinet/cxx-root,root-mirror/root,dfunke/root,veprbl/root,krafczyk/root,smarinac/root,evgeny-boger/root,davidlt/root,evgeny-boger/root,buuck/root,gganis/root,bbockelm/root,arch1tect0r/root,davidlt/root,veprbl/root,pspe/root,zzxuanyuan/root-compressor-dummy,sbinet/cxx-root,omazapa/root,lgiommi/root,BerserkerTroll/root,sirinath/root,zzxuanyuan/root,lgiommi/root,agarciamontoro/root,vukasinmilosevic/root,beniz/root,nilqed/root,thomaskeck/root,nilqed/root,root-mirror/root,perovic/root,abhinavmoudgil95/root,veprbl/root,zzxuanyuan/root,smarinac/root,simonpf/root,agarciamontoro/root,mkret2/root,esakellari/root,beniz/root,nilqed/root,mhuwiler/rootauto,gbitzes/root,buuck/root,omazapa/root-old,perovic/root,gbitzes/root,omazapa/root,zzxuanyuan/root-compressor-dummy,georgtroska/root,karies/root,davidlt/root,georgtroska/root,agarciamontoro/root,evgeny-boger/root,bbockelm/root,simonpf/root,vukasinmilosevic/root,lgiommi/root,vukasinmilosevic/root,nilqed/root,bbockelm/root,sawenzel/root,georgtroska/root,evgeny-boger/root,gganis/root,zzxuanyuan/root,Duraznos/root,sirinath/root,vukasinmilosevic/root,omazapa/root-old,esakellari/root,karies/root,mkret2/root,pspe/root,agarciamontoro/root,smarinac/root,sbinet/cxx-root,jrtomps/root,beniz/root,sawenzel/root,sbinet/cxx-root,simonpf/root,bbockelm/root,sirinath/root,Duraznos/root,BerserkerTroll/root,simonpf/root,esakellari/root,evgeny-boger/root,simonpf/root,veprbl/root,jrtomps/root,smarinac/root,georgtroska/root,esakellari/root,olifre/root,thomaskeck/root,sirinath/root,thomaskeck/root,zzxuanyuan/root,beniz/root,zzxuanyuan/root-compressor-dummy,mhuwiler/rootauto,evgeny-boger/root,lgiommi/root,lgiommi/root,zzxuanyuan/root-compressor-dummy,zzxuanyuan/root,0x0all/ROOT,perovic/root,sawenzel/root,zzxuanyuan/root-compressor-dummy,lgiommi/root,mattkretz/root,Duraznos/root,esakellari/root,nilqed/root,dfunke/root,0x0all/ROOT,perovic/root,evgeny-boger/root,zzxuanyuan/root-compressor-dummy,arch1tect0r/root,karies/root,arch1tect0r/root,omazapa/root,veprbl/root,arch1tect0r/root,jrtomps/root,0x0all/ROOT,mhuwiler/rootauto,dfunke/root,dfunke/root,vukasinmilosevic/root,zzxuanyuan/root-compressor-dummy,mattkretz/root,gbitzes/root,thomaskeck/root,mkret2/root,esakellari/my_root_for_test,buuck/root,nilqed/root,dfunke/root,CristinaCristescu/root,BerserkerTroll/root,pspe/root,olifre/root,zzxuanyuan/root,esakellari/root,krafczyk/root,olifre/root,root-mirror/root,bbockelm/root,perovic/root,georgtroska/root,sirinath/root,mhuwiler/rootauto,esakellari/my_root_for_test,mkret2/root,smarinac/root,sbinet/cxx-root,olifre/root,beniz/root,georgtroska/root,root-mirror/root,omazapa/root-old,mattkretz/root,CristinaCristescu/root,omazapa/root-old,buuck/root,gganis/root,dfunke/root,pspe/root,BerserkerTroll/root,sbinet/cxx-root,Y--/root,sawenzel/root,krafczyk/root,esakellari/my_root_for_test,esakellari/root,pspe/root,lgiommi/root,omazapa/root,mattkretz/root,davidlt/root,bbockelm/root,georgtroska/root,mhuwiler/rootauto,mkret2/root,esakellari/my_root_for_test,0x0all/ROOT,bbockelm/root,omazapa/root-old,satyarth934/root,zzxuanyuan/root-compressor-dummy,mattkretz/root,karies/root,esakellari/my_root_for_test,georgtroska/root,dfunke/root,gganis/root,Y--/root,0x0all/ROOT,dfunke/root,esakellari/my_root_for_test,pspe/root,beniz/root,BerserkerTroll/root,0x0all/ROOT,satyarth934/root,arch1tect0r/root,Duraznos/root,mkret2/root,arch1tect0r/root,omazapa/root,zzxuanyuan/root-compressor-dummy,bbockelm/root,gbitzes/root,perovic/root,omazapa/root-old,Y--/root,CristinaCristescu/root,nilqed/root,Y--/root,arch1tect0r/root,sawenzel/root,perovic/root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