Deploy powershell.exe as content for ConsoleHost

CMake will now output the artifacts of the native build into the
ConsoleHost project, where .NET CLI picks it up as content and deploys
it automatically.

src/Microsoft.PowerShell.ConsoleHost/project.json

@@ -14,6 +14,10 @@
         "Microsoft.PowerShell.Commands.Utility": "1.0.0-*"
     },
 
+    "content": [
+        "powershell.exe"
+    ],
+
     "frameworks": {
         "net451": {
         }