[syslinux] dynamic branch build failure

[Sebastian Herbszt]

# git checkout -f origin/dynamic
HEAD is now at 0d61211... Add __dynsym_len and __dynstr_len
# git describe
syslinux-3.82-564-g0d61211
# make
...
perl genhash.pl < keywords > kwdhash.gen
make[1]: *** No rule to make target `ldlinux.bin', needed by `ldlinux.bss'.  Stop.
make[1]: Leaving directory `syslinux/core'
make: *** [all] Error 2

- Sebastian