Disable JLink GUI when uploading firmware

Author: valeros

builder/main.py

@@ -148,7 +148,8 @@ def _jlink_cmd_script(env, source):
             "-device", board.get("debug", {}).get("jlink_device"),
             "-speed", "4000",
             "-if", ("jtag" if upload_protocol == "jlink-jtag" else "swd"),
-            "-autoconnect", "1"
+            "-autoconnect", "1",
+            "-NoGui", "1"
         ],
         UPLOADCMD='$UPLOADER $UPLOADERFLAGS -CommanderScript "${__jlink_cmd_script(__env__, SOURCE)}"'
     )