Zero the initial drive bytes

src/freedombone-image

@@ -700,6 +700,7 @@ if [[ $IMAGE_TYPE != "qemu"* ]]; then
     fi
     echo ''
     echo "    unxz -k ${PROJECT_NAME}*.img.xz"
+    echo '    sudo dd if=/dev/zero of=/dev/sdX bs=1M count=8'
     echo "    sudo dd bs=1M if=${PROJECT_NAME}*.img of=/dev/sdX conv=fdatasync"
     echo ''
 fi