Fixed missing HAVE_PROCESS_H (caused a warning)

/* Define to 1 if you have the <x509.h> header file. */

#cmakedefine HAVE_X509_H ${HAVE_X509_H}

/* Define if you have the <process.h> header file. */

#cmakedefine HAVE_PROCESS_H ${HAVE_PROCESS_H}

/* if you have the zlib.h header file */

#cmakedefine HAVE_ZLIB_H ${HAVE_ZLIB_H}