Catch KeyboardInterrupt in send_gdb_with_response

Cancellation will generally be seen by the DAP code as a
KeyboardInterrupt.  However, this derives from BaseException and not
Exception, so a small change is needed to send_gdb_with_response, to
forward the exception to the DAP server thread.

Reviewed-By: Kévin Le Gouguec <legouguec@adacore.com>
1 file changed