Updated the update_packages script to support different mcp locations
Updated the update_packages script to support different mcp locations

simon816/MinecraftForge,blay09/MinecraftForge,jdpadrnos/MinecraftForge,karlthepagan/MinecraftForge,Zaggy1024/MinecraftForge,dmf444/MinecraftForge,Theerapak/MinecraftForge,Vorquel/MinecraftForge,luacs1998/MinecraftForge,CrafterKina/MinecraftForge,mickkay/MinecraftForge,Mathe172/MinecraftForge,RainWarrior/MinecraftForge,shadekiller666/MinecraftForge,Ghostlyr/MinecraftForge,ThiagoGarciaAlves/MinecraftForge,bonii-xx/MinecraftForge,fcjailybo/MinecraftForge,brubo1/MinecraftForge