Minor fixes to the native hosting doc (#7122)
Minor fixes to the native hosting doc (#7122)

The main part is to remove the `.a` file reference since we don't actually need or produce it.
MichaelSimons/core-setup,MichaelSimons/core-setup,MichaelSimons/core-setup,wtgodbe/core-setup,crummel/dotnet_core-setup,MichaelSimons/core-setup,MichaelSimons/core-setup,crummel/dotnet_core-setup,wtgodbe/core-setup,wtgodbe/core-setup,wtgodbe/core-setup,MichaelSimons/core-setup,crummel/dotnet_core-setup,wtgodbe/core-setup,crummel/dotnet_core-setup,wtgodbe/core-setup,crummel/dotnet_core-setup,crummel/dotnet_core-setup