Fix libmng compilation on fast computers with fast SSDs (bug #47712). * src/libmng.mk: Run autoreconf in its own process, followed by configure. Delay between processes guarantees that the first is done before the next starts. Disable parallel make (make -j 1).

/*
 * This file is part of MXE.
 * See index.html for further information.
 */

#include <sox.h>

int main(int argc, char *argv[])
{
    (void)argc;
    (void)argv;

    sox_format_init();
    return(0);
}