Added option -h to general helptext of releng

releng/inc/releng_getopts.inc

@@ -15,13 +15,14 @@ GEN_DATA_DIR=releng_generated_data/${SELF}
 print_help() {
 cat << EOF
 
-Usage: $SELF -x path/to/xorriso [-k] [-f] [-c] [-h]
+Usage: $SELF -x path/to/xorriso [-k] [-f] [-c] [-h] 
                                               [-- ...test specific options...]
 General options:
        -x  absolute or relative path to xorriso binary to be run.
        -k  keep self-generated data.
        -c  cleanup self-generated data kept from previous run and exit.
        -f  simulate failure.
+       -h  print this help text
        --  end of general options, begin of test specific options.
 EOF
 }