From Axel: work around a problem building ROOT on windows: cygwin has its own  link.exe (as in hardlink) which clashes with MSVC's link.exe. With  this patch, link is called with its absolute path derived from cl.exe.
From Axel:
work around a problem building ROOT on windows: cygwin has its own 
link.exe (as in hardlink) which clashes with MSVC's link.exe. With 
this patch, link is called with its absolute path derived from cl.exe.


git-svn-id: acec3fd5b7ea1eb9e79d6329d318e8118ee2e14f@22681 27541ba8-7e3a-0410-8455-c3a389f83636

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