fix src directory

Tools/Config/config.json

@@ -661,8 +661,7 @@
                 "packageName": "@babylonjs/viewer",
                 "readme": "Viewer/README-ES6.md",
                 "skipLibCheck": true,
-                "index": "src/index.js",
-                "typings": "src/index.d.ts"
+                "packageBuildFolder": "src"
             }
         }
     },

Tools/Publisher/tasks/processEs6Packages.js

@@ -23,6 +23,9 @@ function processEs6Packages(version) {
         colorConsole.log("Process " + "ES6".magenta + " Package: " + moduleName.blue.bold);
 
         let distPath = module.computed.distES6Directory;
+        if (es6Config.packageBuildFolder) {
+            distPath = path.join(distPath, es6Config.packageBuildFolder);
+        }
         let packagePath = module.computed.packageES6Directory;
         let umdPackageJson = require(module.computed.packageJSONPath);