Update comments to mention iOS also is not supported.
Update comments to mention iOS also is not supported.

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