Merge pull request dotnet#4119 from dotnet/preview2-upgrade

Upgrade Corefx and coreclr references

fix typo in dotnet-install file

This was needed to rebuild the CLI with the updated Roslyn NuGet packages.

Thanks goes to @akoken for the fix.

Update NuGet.* dependencies of CLI to use 3.5.0-beta-final (dotnet#3005)

Update NuGet.* dependencies of CLI to use 3.5.0-beta-final (dotnet#3005)