Update src/corehost/cli/fxr/fx_muxer.cpp
Update src/corehost/cli/fxr/fx_muxer.cpp

Co-Authored-By: sdmaclea <cba1e3befb508d4c19f502ca5549d3e2c2e5c2c2@microsoft.com>
MichaelSimons/core-setup,crummel/dotnet_core-setup,crummel/dotnet_core-setup,crummel/dotnet_core-setup,MichaelSimons/core-setup,MichaelSimons/core-setup,MichaelSimons/core-setup,wtgodbe/core-setup,wtgodbe/core-setup,wtgodbe/core-setup,crummel/dotnet_core-setup,wtgodbe/core-setup,MichaelSimons/core-setup,wtgodbe/core-setup,crummel/dotnet_core-setup,crummel/dotnet_core-setup,MichaelSimons/core-setup,wtgodbe/core-setup