Install hdparm for benchmarks

src/freedombone-image-customise

     chroot "$rootdir" apt-get -yq dist-upgrade
     chroot "$rootdir" apt-get -yq install ca-certificates
     chroot "$rootdir" apt-get -yq install apt-utils
-    chroot "$rootdir" apt-get -yq install shellcheck
+    chroot "$rootdir" apt-get -yq install shellcheck hdparm
 
     if [[ "$ARCHITECTURE" == 'amd64' ]]; then
         chroot "$rootdir" apt-get -yq install linux-image-amd64

src/freedombone-utils-setup

 
 function microsd_card_optimisations {
     # These values can improve performance on microSD cards
+
+    apt-get -yq install hdparm
+
     printf '#!/bin/bash\n' > /usr/bin/enable_optimisations
 
     if [ -f /sys/devices/virtual/bdi/179:0/read_ahead_kb ]; then