dependencies: make ti wlcore depend on kernel >= 3.2

wlcore uses no_seek_end_llseek() which is only backported to kernel >=
3.2. generic_file_llseek_size() is only available for kernel >= 3.2 and
needed by no_seek_end_llseek().

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>