Fixed an issue when --upload-port CLI flag does not override declared upload_port option in "platformio.ini"

platformio/builder/main.py

@@ -97,6 +97,7 @@ env.Replace(
         for key in list(clivars.keys()) if key in env
     })
 
+
 if env.subst("$BUILDCACHE_DIR"):
     if not isdir(env.subst("$BUILDCACHE_DIR")):
         makedirs(env.subst("$BUILDCACHE_DIR"))