Apply product commands in a more pythonic way

Author: mario-vera

lib/script.py

@@ -226,15 +226,7 @@ def generate_products(self):
         script = flags + commands
 
         for product in self.products:
-            items = product.generate()
-            for item in items:
-                if isinstance(item, list):
-                    for subitem in item:
-                        #TODO: What to do with this elements?
-                        #script += subitem
-                        continue
-                else:
-                    script += item
+            script += "".join([product_build_command for product_build_command in product.generate() if not isinstance(product_build_command, list)])
 
         script += """