Added pthread as a link flag.
Added pthread as a link flag.

mmdk95/cuberite,Schwertspize/cuberite,linnemannr/MCServer,johnsoch/cuberite,nicodinh/cuberite,Tri125/MCServer,QUSpilPrgm/cuberite,birkett/cuberite,birkett/cuberite,marvinkopf/cuberite,linnemannr/MCServer,electromatter/cuberite,birkett/cuberite,bendl/cuberite,johnsoch/cuberite,marvinkopf/cuberite,mmdk95/cuberite,Altenius/cuberite,Altenius/cuberite,birkett/cuberite,Schwertspize/cuberite,nicodinh/cuberite,Tri125/MCServer,nounoursheureux/MCServer,birkett/MCServer,zackp30/cuberite,HelenaKitty/EbooMC,bendl/cuberite,marvinkopf/cuberite,Tri125/MCServer,Fighter19/cuberite,HelenaKitty/EbooMC,Haxi52/cuberite,johnsoch/cuberite,nichwall/cuberite,nounoursheureux/MCServer,ionux/MCServer,zackp30/cuberite,Tri125/MCServer,Altenius/cuberite,marvinkopf/cuberite,Altenius/cuberite,zackp30/cuberite,SamOatesPlugins/cuberite,mmdk95/cuberite,thetaeo/cuberite,nounoursheureux/MCServer,Howaner/MCServer,nichwall/cuberite,nounoursheureux/MCServer,mc-server/MCServer,electromatter/cuberite,birkett/cuberite,QUSpilPrgm/cuberite,HelenaKitty/EbooMC,tonibm19/cuberite,Frownigami1/cuberite,Haxi52/cuberite,tonibm19/cuberite,Howaner/MCServer,Fighter19/cuberite,ionux/MCServer,johnsoch/cuberite,Tri125/MCServer,Howaner/MCServer,Fighter19/cuberite,Altenius/cuberite,Fighter19/cuberite,Frownigami1/cuberite,nevercast/cuberite,tonibm19/cuberite,Tri125/MCServer,ionux/MCServer,nevercast/cuberite,bendl/cuberite,birkett/MCServer,Howaner/MCServer,nounoursheureux/MCServer,Haxi52/cuberite,nevercast/cuberite,nicodinh/cuberite,thetaeo/cuberite,birkett/MCServer,nevercast/cuberite,johnsoch/cuberite,mc-server/MCServer,Schwertspize/cuberite,mc-server/MCServer,electromatter/cuberite,Howaner/MCServer,thetaeo/cuberite,mmdk95/cuberite,nichwall/cuberite,birkett/MCServer,nicodinh/cuberite,linnemannr/MCServer,electromatter/cuberite,bendl/cuberite,mmdk95/cuberite,bendl/cuberite,linnemannr/MCServer,tonibm19/cuberite,linnemannr/MCServer,SamOatesPlugins/cuberite,electromatter/cuberite,QUSpilPrgm/cuberite,thetaeo/cuberite,birkett/MCServer,thetaeo/cuberite,zackp30/cuberite,Frownigami1/cuberite,linnemannr/MCServer,thetaeo/cuberite,nounoursheureux/MCServer,nicodinh/cuberite,mjssw/cuberite,electromatter/cuberite,HelenaKitty/EbooMC,QUSpilPrgm/cuberite,mmdk95/cuberite,ionux/MCServer,kevinr/cuberite,mjssw/cuberite,ionux/MCServer,Haxi52/cuberite,QUSpilPrgm/cuberite,nevercast/cuberite,Howaner/MCServer,birkett/MCServer,mc-server/MCServer,kevinr/cuberite,marvinkopf/cuberite,Fighter19/cuberite,nevercast/cuberite,Schwertspize/cuberite,nichwall/cuberite,zackp30/cuberite,kevinr/cuberite,mc-server/MCServer,Haxi52/cuberite,mjssw/cuberite,mjssw/cuberite,SamOatesPlugins/cuberite,Frownigami1/cuberite,kevinr/cuberite,Haxi52/cuberite,zackp30/cuberite,kevinr/cuberite,QUSpilPrgm/cuberite,Schwertspize/cuberite,SamOatesPlugins/cuberite,mjssw/cuberite,nicodinh/cuberite,kevinr/cuberite,tonibm19/cuberite,birkett/cuberite,nichwall/cuberite,Fighter19/cuberite,ionux/MCServer,marvinkopf/cuberite,HelenaKitty/EbooMC,SamOatesPlugins/cuberite,nichwall/cuberite,mjssw/cuberite,tonibm19/cuberite,mc-server/MCServer,Frownigami1/cuberite