[FIX] product_extended: BOM Correct total cost

When calculating the cost, quantity did not take the product efficiency into
account when calculating the cost. The quantities on the MO order were correct,
but not the cost that needs to be increased to compensent efficiency.

Closes #5927
Closes #7648

addons/product_extended/product_extended.py

@@ -74,7 +74,7 @@ class product_template(osv.osv):
         uom_obj = self.pool.get("product.uom")
         tmpl_obj = self.pool.get('product.template')
         for sbom in bom.bom_line_ids:
-            my_qty = sbom.product_qty
+            my_qty = sbom.product_qty / sbom.product_efficiency
             if not sbom.attribute_value_ids:
                 # No attribute_value_ids means the bom line is not variant specific
                 price += uom_obj._compute_price(cr, uid, sbom.product_id.uom_id.id, sbom.product_id.standard_price, sbom.product_uom.id) * my_qty