update dotnet-svcutil.exe version to get ready for preview1 release (#4437)
update dotnet-svcutil.exe version to get ready for preview1 release (#4437)


imcarolwang/wcf,imcarolwang/wcf,mconnew/wcf,dotnet/wcf,dotnet/wcf,imcarolwang/wcf,dotnet/wcf,mconnew/wcf,mconnew/wcf