React to common package name change

Author: troydai

src/Microsoft.AspNet.StaticFiles/project.json

@@ -6,7 +6,7 @@
         "Microsoft.AspNet.FileProviders.Abstractions": "1.0.0-*",
         "Microsoft.AspNet.Hosting.Abstractions": "1.0.0-*",
         "Microsoft.Framework.Logging.Abstractions": "1.0.0-*",
-        "Microsoft.Framework.NotNullAttribute.Internal": { "type": "build", "version": "1.0.0-*" },
+        "Microsoft.Framework.NotNullAttribute.Sources": { "type": "build", "version": "1.0.0-*" },
         "Microsoft.Framework.WebEncoders": "1.0.0-*"
     },
     "frameworks": {