make -h option work for mkrootfs and mkplatformfs

Closes: #133 [via git-merge-pr]

mkplatformfs.sh.in

@@ -72,7 +72,7 @@ _EOF
 
 BASEPKG=base-system
 
-while getopts "b:p:k:c:C:r:x:h:V" opt; do
+while getopts "b:p:k:c:C:r:x:hV" opt; do
     case $opt in
         b) BASEPKG="$OPTARG" ;;
         p) EXTRA_PKGS="$OPTARG" ;;

mkrootfs.sh.in

@@ -73,7 +73,7 @@ _EOF
 
 # Boilerplate option parsing.  This script supports the bare minimum
 # needed to build an image.
-while getopts "C:c:h:r:x:o:V" opt; do
+while getopts "C:c:hr:x:o:V" opt; do
     case $opt in
         C) XBPS_CONFFILE="-C $OPTARG";;
         c) XBPS_CACHEDIR="--cachedir=$OPTARG";;