title: compile .net-core 1.1.0 app against 4.6.x
body: <p>trying to compile my asp.netcore 1.1 app against .net framework 4.6.x
  my project.json:</p>
  
  <pre><code>"frameworks": {
    "netcoreapp1.0": {
      "imports": [
        "dotnet5.6",
        "portable-net45+win8"
      ],
      "dependencies": {
        "Microsoft.NETCore.App": {
          "type": "platform",
          "version": "1.0.0"
        }
      }
    },
    "net462": {
    }
  },
  </code></pre>
  
  <p>but then package restore complains with: </p>
  
  <pre><code>Package Microsoft.NETCore.App 1.1.0 is not compatible with net462 (.NETFramework,Version=v4.6.2). Package Microsoft.NETCore.App 1.1.0 supports: netcoreapp1.0 (.NETCoreApp,Version=v1.0)
      One or more packages are incompatible with .NETFramework,Version=v4.6.2.
  </code></pre>