Merge "copy ldlinux.c32 to /tftpboot in ironic_pxe"

docker/ironic/ironic-pxe/extend_start.sh

@@ -6,7 +6,7 @@ if [[ "${!KOLLA_BOOTSTRAP[@]}" ]]; then
     chown -R ironic: /tftpboot
     for pxe_file in /var/lib/tftpboot/pxelinux.0 /var/lib/tftpboot/chain.c32 /usr/lib/syslinux/pxelinux.0 \
                     /usr/lib/syslinux/chain.c32 /usr/lib/PXELINUX/pxelinux.0 \
-                    /usr/lib/syslinux/modules/bios/chain.c32; do
+                    /usr/lib/syslinux/modules/bios/chain.c32 /usr/lib/syslinux/modules/bios/ldlinux.c32; do
         if [[ -e "$pxe_file" ]]; then
             cp "$pxe_file" /tftpboot
         fi