Add Start-TypeGen

Update Microsoft.PowerShell.CoreCLR.AssemblyLoadContext\project.json
Include Crypto package for new source code

src/Microsoft.PowerShell.CoreCLR.AssemblyLoadContext/project.json

@@ -26,7 +26,9 @@
             },
             "dependencies": {
                 "NETStandard.Library": "1.5.0-rc2-24027",
-                "System.Runtime.Loader": "4.0.0-rc2-24027"
+                "System.Runtime.Loader": "4.0.0-rc2-24027",
+                "System.Reflection.Metadata": "1.1.0",
+                "System.Security.Cryptography.Algorithms": "4.1.0-rc2-24027"
             }
         }
     }