Fix path for memdisk binary when building with recent syslinux[-commo…

…n] versions

Addressing:

| * Missing addon file: "memdisk"

grml-live

@@ -942,10 +942,12 @@ if [ "$ARCH" = i386 ] || [ "$ARCH" = amd64 ] ; then
             else
               syslinux_modules_dir=/usr/lib/syslinux
             fi
-            for file in memdisk chain.c32 hdt.c32 mboot.c32 menu.c32; do
+            for file in chain.c32 hdt.c32 mboot.c32 menu.c32; do
               copy_addon_file "${file}" "${syslinux_modules_dir}" addons
             done
 
+            copy_addon_file memdisk /usr/lib/syslinux addons
+
             # make memtest filename FAT16/8.3 compatible
             mv "${BUILD_OUTPUT}/boot/addons/memtest86+.bin" \
               "${BUILD_OUTPUT}/boot/addons/memtest"