rpc_wrappers: lte_at_cmd: echo provided command

Echo the provided command when the response is received. AT commands
can include the `$` character for vendor specific extensions, which can
cause shell substitution problems (wrap like this 'AT$CMD' to disable
shell expansion). Printing the command sent makes these errors more
obvious.

Signed-off-by: Jordan Yates <jordan@embeint.com>

Author: JordanYates

src/infuse_iot/rpc_wrappers/lte_at_cmd.py

@@ -34,6 +34,7 @@ def handle_response(self, return_code, response):
             response_bytes = bytes(response.rsp)
             if len(response_bytes):
                 decoded = bytes(response.rsp).decode("utf-8").strip()
+                print(f"> {self.args.cmd}")
                 print(decoded)
         # Notification that command failed
         if return_code != 0: