cleanup building c/c++ on windows
cleanup building c/c++ on windows

daniel-j-born/grpc,daniel-j-born/grpc,deepaklukose/grpc,nicolasnoble/grpc,firebase/grpc,mehrdada/grpc,muxi/grpc,Vizerai/grpc,jtattermusch/grpc,dgquintas/grpc,murgatroid99/grpc,jboeuf/grpc,fuchsia-mirror/third_party-grpc,ejona86/grpc,pszemus/grpc,grpc/grpc,vjpai/grpc,pszemus/grpc,thinkerou/grpc,nicolasnoble/grpc,chrisdunelm/grpc,stanley-cheung/grpc,nicolasnoble/grpc,carl-mastrangelo/grpc,donnadionne/grpc,kumaralokgithub/grpc,PeterFaiman/ruby-grpc-minimal,dgquintas/grpc,vjpai/grpc,carl-mastrangelo/grpc,firebase/grpc,grpc/grpc,chrisdunelm/grpc,fuchsia-mirror/third_party-grpc,muxi/grpc,mehrdada/grpc,quizlet/grpc,pszemus/grpc,ejona86/grpc,firebase/grpc,geffzhang/grpc,donnadionne/grpc,matt-kwong/grpc,yongni/grpc,jtattermusch/grpc,ctiller/grpc,firebase/grpc,stanley-cheung/grpc,jtattermusch/grpc,stanley-cheung/grpc,ejona86/grpc,quizlet/grpc,pszemus/grpc,stanley-cheung/grpc,thinkerou/grpc,yongni/grpc,chrisdunelm/grpc,jtattermusch/grpc,carl-mastrangelo/grpc,murgatroid99/grpc,pszemus/grpc,Crevil/grpc,sreecha/grpc,grpc/grpc,carl-mastrangelo/grpc,ncteisen/grpc,Vizerai/grpc,muxi/grpc,quizlet/grpc,matt-kwong/grpc,sreecha/grpc,PeterFaiman/ruby-grpc-minimal,mehrdada/grpc,yongni/grpc,simonkuang/grpc,chrisdunelm/grpc,stanley-cheung/grpc,sreecha/grpc,Vizerai/grpc,mehrdada/grpc,quizlet/grpc,simonkuang/grpc,sreecha/grpc,matt-kwong/grpc,jtattermusch/grpc,ncteisen/grpc,deepaklukose/grpc,ctiller/grpc,pszemus/grpc,ncteisen/grpc,nicolasnoble/grpc,mehrdada/grpc,nicolasnoble/grpc,firebase/grpc,stanley-cheung/grpc,stanley-cheung/grpc,Vizerai/grpc,fuchsia-mirror/third_party-grpc,ctiller/grpc,adelez/grpc,jtattermusch/grpc,deepaklukose/grpc,vjpai/grpc,kpayson64/grpc,sreecha/grpc,mehrdada/grpc,jboeuf/grpc,jtattermusch/grpc,murgatroid99/grpc,quizlet/grpc,dgquintas/grpc,chrisdunelm/grpc,jboeuf/grpc,ctiller/grpc,PeterFaiman/ruby-grpc-minimal,donnadionne/grpc,PeterFaiman/ruby-grpc-minimal,grpc/grpc,grpc/grpc,vjpai/grpc,ejona86/grpc,muxi/grpc,kpayson64/grpc,ncteisen/grpc,quizlet/grpc,adelez/grpc,ejona86/grpc,murgatroid99/grpc,dgquintas/grpc,chrisdunelm/grpc,adelez/grpc,fuchsia-mirror/third_party-grpc,kpayson64/grpc,vjpai/grpc,geffzhang/grpc,daniel-j-born/grpc,Vizerai/grpc,geffzhang/grpc,carl-mastrangelo/grpc,murgatroid99/grpc,sreecha/grpc,ctiller/grpc,mehrdada/grpc,PeterFaiman/ruby-grpc-minimal,murgatroid99/grpc,PeterFaiman/ruby-grpc-minimal,geffzhang/grpc,murgatroid99/grpc,kumaralokgithub/grpc,muxi/grpc,nicolasnoble/grpc,donnadionne/grpc,kumaralokgithub/grpc,jtattermusch/grpc,Vizerai/grpc,ejona86/grpc,sreecha/grpc,jtattermusch/grpc,deepaklukose/grpc,murgatroid99/grpc,matt-kwong/grpc,matt-kwong/grpc,muxi/grpc,simonkuang/grpc,carl-mastrangelo/grpc,daniel-j-born/grpc,thinkerou/grpc,fuchsia-mirror/third_party-grpc,ejona86/grpc,jboeuf/grpc,grpc/grpc,ctiller/grpc,quizlet/grpc,ejona86/grpc,ctiller/grpc,ejona86/grpc,fuchsia-mirror/third_party-grpc,geffzhang/grpc,deepaklukose/grpc,vjpai/grpc,stanley-cheung/grpc,thinkerou/grpc,dgquintas/grpc,nicolasnoble/grpc,muxi/grpc,deepaklukose/grpc,pszemus/grpc,jboeuf/grpc,thinkerou/grpc,ncteisen/grpc,yongni/grpc,firebase/grpc,nicolasnoble/grpc,muxi/grpc,donnadionne/grpc,fuchsia-mirror/third_party-grpc,chrisdunelm/grpc,sreecha/grpc,pszemus/grpc,thinkerou/grpc,deepaklukose/grpc,geffzhang/grpc,grpc/grpc,geffzhang/grpc,nicolasnoble/grpc,grpc/grpc,grpc/grpc,ncteisen/grpc,quizlet/grpc,carl-mastrangelo/grpc,dgquintas/grpc,daniel-j-born/grpc,pszemus/grpc,Crevil/grpc,carl-mastrangelo/grpc,matt-kwong/grpc,firebase/grpc,Vizerai/grpc,mehrdada/grpc,adelez/grpc,donnadionne/grpc,sreecha/grpc,stanley-cheung/grpc,thinkerou/grpc,Crevil/grpc,thinkerou/grpc,chrisdunelm/grpc,fuchsia-mirror/third_party-grpc,mehrdada/grpc,muxi/grpc,kpayson64/grpc,yongni/grpc,firebase/grpc,thinkerou/grpc,Vizerai/grpc,donnadionne/grpc,pszemus/grpc,muxi/grpc,ncteisen/grpc,simonkuang/grpc,carl-mastrangelo/grpc,jtattermusch/grpc,firebase/grpc,dgquintas/grpc,muxi/grpc,stanley-cheung/grpc,jtattermusch/grpc,nicolasnoble/grpc,deepaklukose/grpc,simonkuang/grpc,simonkuang/grpc,vjpai/grpc,ctiller/grpc,sreecha/grpc,grpc/grpc,muxi/grpc,ejona86/grpc,thinkerou/grpc,ctiller/grpc,ncteisen/grpc,kumaralokgithub/grpc,thinkerou/grpc,jboeuf/grpc,pszemus/grpc,sreecha/grpc,yongni/grpc,vjpai/grpc,jboeuf/grpc,daniel-j-born/grpc,jtattermusch/grpc,fuchsia-mirror/third_party-grpc,Vizerai/grpc,simonkuang/grpc,vjpai/grpc,simonkuang/grpc,ejona86/grpc,firebase/grpc,adelez/grpc,PeterFaiman/ruby-grpc-minimal,kumaralokgithub/grpc,kpayson64/grpc,deepaklukose/grpc,pszemus/grpc,ncteisen/grpc,geffzhang/grpc,kpayson64/grpc,nicolasnoble/grpc,kpayson64/grpc,dgquintas/grpc,donnadionne/grpc,mehrdada/grpc,mehrdada/grpc,Crevil/grpc,murgatroid99/grpc,PeterFaiman/ruby-grpc-minimal,daniel-j-born/grpc,kpayson64/grpc,yongni/grpc,ncteisen/grpc,adelez/grpc,fuchsia-mirror/third_party-grpc,matt-kwong/grpc,PeterFaiman/ruby-grpc-minimal,carl-mastrangelo/grpc,adelez/grpc,murgatroid99/grpc,vjpai/grpc,Vizerai/grpc,mehrdada/grpc,ncteisen/grpc,daniel-j-born/grpc,sreecha/grpc,grpc/grpc,donnadionne/grpc,firebase/grpc,jboeuf/grpc,daniel-j-born/grpc,matt-kwong/grpc,firebase/grpc,dgquintas/grpc,ncteisen/grpc,adelez/grpc,quizlet/grpc,simonkuang/grpc,ctiller/grpc,kpayson64/grpc,chrisdunelm/grpc,donnadionne/grpc,adelez/grpc,nicolasnoble/grpc,ctiller/grpc,kumaralokgithub/grpc,kumaralokgithub/grpc,donnadionne/grpc,jboeuf/grpc,geffzhang/grpc,kumaralokgithub/grpc,stanley-cheung/grpc,stanley-cheung/grpc,Crevil/grpc,ejona86/grpc,Crevil/grpc,jboeuf/grpc,Vizerai/grpc,Crevil/grpc,thinkerou/grpc,grpc/grpc,kpayson64/grpc,jboeuf/grpc,kpayson64/grpc,yongni/grpc,vjpai/grpc,vjpai/grpc,jboeuf/grpc,chrisdunelm/grpc,Crevil/grpc,ctiller/grpc,dgquintas/grpc,dgquintas/grpc,matt-kwong/grpc,Crevil/grpc,carl-mastrangelo/grpc,kumaralokgithub/grpc,yongni/grpc,carl-mastrangelo/grpc,PeterFaiman/ruby-grpc-minimal,chrisdunelm/grpc,donnadionne/grpc