revert xml2 header check, and improve lib and include directory search for ios.
revert xml2 header check, and improve lib and include directory search
for ios.


git-svn-id: acec3fd5b7ea1eb9e79d6329d318e8118ee2e14f@35693 27541ba8-7e3a-0410-8455-c3a389f83636

zzxuanyuan/root-compressor-dummy,sirinath/root,tc3t/qoot,smarinac/root,abhinavmoudgil95/root,davidlt/root,davidlt/root,perovic/root,0x0all/ROOT,ffurano/root5,pspe/root,Dr15Jones/root,sbinet/cxx-root,olifre/root,abhinavmoudgil95/root,georgtroska/root,zzxuanyuan/root,vukasinmilosevic/root,simonpf/root,Duraznos/root,arch1tect0r/root,omazapa/root-old,mattkretz/root,mhuwiler/rootauto,Duraznos/root,evgeny-boger/root,omazapa/root,perovic/root,arch1tect0r/root,mhuwiler/rootauto,satyarth934/root,sirinath/root,BerserkerTroll/root,karies/root,esakellari/root,kirbyherm/root-r-tools,davidlt/root,karies/root,mhuwiler/rootauto,0x0all/ROOT,mkret2/root,dfunke/root,davidlt/root,perovic/root,Y--/root,lgiommi/root,omazapa/root,mattkretz/root,CristinaCristescu/root,ffurano/root5,mkret2/root,esakellari/my_root_for_test,alexschlueter/cern-root,lgiommi/root,mkret2/root,buuck/root,mhuwiler/rootauto,karies/root,Duraznos/root,abhinavmoudgil95/root,jrtomps/root,esakellari/root,smarinac/root,omazapa/root-old,perovic/root,smarinac/root,omazapa/root,gganis/root,beniz/root,krafczyk/root,pspe/root,CristinaCristescu/root,karies/root,satyarth934/root,BerserkerTroll/root,nilqed/root,georgtroska/root,sbinet/cxx-root,sbinet/cxx-root,veprbl/root,ffurano/root5,sirinath/root,zzxuanyuan/root-compressor-dummy,georgtroska/root,zzxuanyuan/root,arch1tect0r/root,gbitzes/root,agarciamontoro/root,olifre/root,gbitzes/root,jrtomps/root,Y--/root,thomaskeck/root,tc3t/qoot,strykejern/TTreeReader,davidlt/root,bbockelm/root,BerserkerTroll/root,gganis/root,karies/root,thomaskeck/root,vukasinmilosevic/root,georgtroska/root,pspe/root,nilqed/root,dfunke/root,gbitzes/root,BerserkerTroll/root,davidlt/root,olifre/root,pspe/root,esakellari/root,krafczyk/root,arch1tect0r/root,omazapa/root-old,alexschlueter/cern-root,sirinath/root,jrtomps/root,CristinaCristescu/root,BerserkerTroll/root,georgtroska/root,satyarth934/root,agarciamontoro/root,agarciamontoro/root,Duraznos/root,abhinavmoudgil95/root,smarinac/root,esakellari/root,jrtomps/root,mhuwiler/rootauto,smarinac/root,arch1tect0r/root,satyarth934/root,abhinavmoudgil95/root,Duraznos/root,agarciamontoro/root,simonpf/root,root-mirror/root,zzxuanyuan/root,olifre/root,vukasinmilosevic/root,alexschlueter/cern-root,davidlt/root,sirinath/root,simonpf/root,smarinac/root,nilqed/root,mkret2/root,bbockelm/root,buuck/root,buuck/root,ffurano/root5,evgeny-boger/root,mkret2/root,sawenzel/root,mhuwiler/rootauto,sawenzel/root,zzxuanyuan/root-compressor-dummy,dfunke/root,kirbyherm/root-r-tools,satyarth934/root,tc3t/qoot,BerserkerTroll/root,beniz/root,thomaskeck/root,esakellari/root,kirbyherm/root-r-tools,georgtroska/root,perovic/root,esakellari/my_root_for_test,dfunke/root,0x0all/ROOT,sirinath/root,buuck/root,evgeny-boger/root,gganis/root,0x0all/ROOT,veprbl/root,root-mirror/root,zzxuanyuan/root,vukasinmilosevic/root,veprbl/root,jrtomps/root,Y--/root,gganis/root,olifre/root,esakellari/my_root_for_test,davidlt/root,jrtomps/root,tc3t/qoot,krafczyk/root,krafczyk/root,veprbl/root,sawenzel/root,zzxuanyuan/root-compressor-dummy,gganis/root,agarciamontoro/root,mattkretz/root,Y--/root,lgiommi/root,BerserkerTroll/root,mattkretz/root,0x0all/ROOT,satyarth934/root,cxx-hep/root-cern,jrtomps/root,Y--/root,mkret2/root,tc3t/qoot,ffurano/root5,georgtroska/root,sawenzel/root,mattkretz/root,Dr15Jones/root,beniz/root,thomaskeck/root,0x0all/ROOT,olifre/root,buuck/root,sbinet/cxx-root,strykejern/TTreeReader,perovic/root,lgiommi/root,jrtomps/root,omazapa/root-old,simonpf/root,beniz/root,mkret2/root,Y--/root,olifre/root,bbockelm/root,mkret2/root,zzxuanyuan/root-compressor-dummy,lgiommi/root,strykejern/TTreeReader,esakellari/my_root_for_test,root-mirror/root,cxx-hep/root-cern,cxx-hep/root-cern,zzxuanyuan/root,sirinath/root,root-mirror/root,mattkretz/root,evgeny-boger/root,perovic/root,mhuwiler/rootauto,pspe/root,nilqed/root,strykejern/TTreeReader,gganis/root,dfunke/root,sirinath/root,root-mirror/root,mhuwiler/rootauto,evgeny-boger/root,agarciamontoro/root,abhinavmoudgil95/root,simonpf/root,bbockelm/root,dfunke/root,Dr15Jones/root,simonpf/root,sirinath/root,Duraznos/root,buuck/root,sawenzel/root,zzxuanyuan/root,sawenzel/root,agarciamontoro/root,root-mirror/root,CristinaCristescu/root,cxx-hep/root-cern,simonpf/root,pspe/root,alexschlueter/cern-root,0x0all/ROOT,smarinac/root,lgiommi/root,omazapa/root,esakellari/root,BerserkerTroll/root,agarciamontoro/root,mattkretz/root,karies/root,sawenzel/root,zzxuanyuan/root,nilqed/root,sbinet/cxx-root,gbitzes/root,zzxuanyuan/root-compressor-dummy,olifre/root,krafczyk/root,omazapa/root-old,kirbyherm/root-r-tools,nilqed/root,omazapa/root,kirbyherm/root-r-tools,Duraznos/root,nilqed/root,gganis/root,cxx-hep/root-cern,georgtroska/root,veprbl/root,vukasinmilosevic/root,veprbl/root,mhuwiler/rootauto,nilqed/root,sirinath/root,satyarth934/root,ffurano/root5,karies/root,smarinac/root,perovic/root,esakellari/my_root_for_test,davidlt/root,Dr15Jones/root,CristinaCristescu/root,mhuwiler/rootauto,davidlt/root,arch1tect0r/root,perovic/root,simonpf/root,dfunke/root,thomaskeck/root,zzxuanyuan/root-compressor-dummy,beniz/root,simonpf/root,omazapa/root-old,buuck/root,omazapa/root,evgeny-boger/root,CristinaCristescu/root,vukasinmilosevic/root,mkret2/root,krafczyk/root,buuck/root,smarinac/root,arch1tect0r/root,evgeny-boger/root,agarciamontoro/root,cxx-hep/root-cern,beniz/root,evgeny-boger/root,satyarth934/root,root-mirror/root,veprbl/root,lgiommi/root,satyarth934/root,esakellari/root,zzxuanyuan/root-compressor-dummy,omazapa/root,evgeny-boger/root,gganis/root,perovic/root,arch1tect0r/root,lgiommi/root,mkret2/root,olifre/root,omazapa/root-old,root-mirror/root,esakellari/my_root_for_test,bbockelm/root,zzxuanyuan/root-compressor-dummy,agarciamontoro/root,buuck/root,strykejern/TTreeReader,gbitzes/root,evgeny-boger/root,pspe/root,omazapa/root-old,beniz/root,perovic/root,beniz/root,sbinet/cxx-root,beniz/root,zzxuanyuan/root-compressor-dummy,CristinaCristescu/root,veprbl/root,esakellari/my_root_for_test,pspe/root,omazapa/root,omazapa/root-old,CristinaCristescu/root,dfunke/root,georgtroska/root,thomaskeck/root,CristinaCristescu/root,beniz/root,krafczyk/root,bbockelm/root,kirbyherm/root-r-tools,gbitzes/root,zzxuanyuan/root,lgiommi/root,Duraznos/root,mattkretz/root,esakellari/root,gganis/root,agarciamontoro/root,alexschlueter/cern-root,zzxuanyuan/root,0x0all/ROOT,gbitzes/root,dfunke/root,satyarth934/root,esakellari/my_root_for_test,karies/root,thomaskeck/root,cxx-hep/root-cern,nilqed/root,Y--/root,abhinavmoudgil95/root,satyarth934/root,abhinavmoudgil95/root,zzxuanyuan/root-compressor-dummy,georgtroska/root,veprbl/root,vukasinmilosevic/root,sbinet/cxx-root,jrtomps/root,sawenzel/root,omazapa/root,Dr15Jones/root,davidlt/root,tc3t/qoot,omazapa/root-old,gbitzes/root,beniz/root,strykejern/TTreeReader,simonpf/root,BerserkerTroll/root,Duraznos/root,sbinet/cxx-root,omazapa/root-old,veprbl/root,abhinavmoudgil95/root,mhuwiler/rootauto,sbinet/cxx-root,simonpf/root,thomaskeck/root,karies/root,mattkretz/root,dfunke/root,mattkretz/root,esakellari/root,pspe/root,krafczyk/root,zzxuanyuan/root,dfunke/root,vukasinmilosevic/root,alexschlueter/cern-root,krafczyk/root,thomaskeck/root,omazapa/root,bbockelm/root,olifre/root,esakellari/my_root_for_test,tc3t/qoot,pspe/root,gbitzes/root,Y--/root,sawenzel/root,cxx-hep/root-cern,CristinaCristescu/root,gbitzes/root,mattkretz/root,arch1tect0r/root,BerserkerTroll/root,buuck/root,Y--/root,ffurano/root5,root-mirror/root,krafczyk/root,tc3t/qoot,sbinet/cxx-root,mkret2/root,gbitzes/root,lgiommi/root,karies/root,Dr15Jones/root,olifre/root,sawenzel/root,arch1tect0r/root,esakellari/root,Y--/root,abhinavmoudgil95/root,root-mirror/root,evgeny-boger/root,alexschlueter/cern-root,lgiommi/root,bbockelm/root,pspe/root,buuck/root,nilqed/root,bbockelm/root,omazapa/root,nilqed/root,tc3t/qoot,veprbl/root,karies/root,krafczyk/root,georgtroska/root,jrtomps/root,esakellari/my_root_for_test,bbockelm/root,bbockelm/root,zzxuanyuan/root,strykejern/TTreeReader,vukasinmilosevic/root,Dr15Jones/root,Duraznos/root,gganis/root,sbinet/cxx-root,abhinavmoudgil95/root,kirbyherm/root-r-tools,esakellari/root,zzxuanyuan/root,smarinac/root,gganis/root,jrtomps/root,arch1tect0r/root,sirinath/root,tc3t/qoot,vukasinmilosevic/root,0x0all/ROOT,BerserkerTroll/root,root-mirror/root,Duraznos/root,sawenzel/root,vukasinmilosevic/root,thomaskeck/root,Y--/root,CristinaCristescu/root