util-linux: fix parallel build issue

util-linux: fix parallel build issue

The rule SETARCH_MAN_LINKS is used for the files under the sys-utils
dir, for example:

echo ".so man8/setarch.8" > sys-utils/linux32.8

but it depends on nothing so that the sys-utils dir may not exist, we
can create the sys-utils dir to fix problem.

[YOCTO #6115]

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>