remove /lib/rc/tmp creation from meson script

It is apparently for a piece of code that no longer exist.
There don't seem to be any part of the code referring to this directory (anymore, if there was).

tools/meson_final.sh

@@ -11,7 +11,6 @@ sysvinit="$4"
 if [ "${os}" != Linux ]; then
 	install -d "${DESTDIR}/${rc_libexecdir}"/init.d
 fi
-install -d "${DESTDIR}/${rc_libexecdir}"/tmp
 install -m 644 "${MESON_BUILD_ROOT}/src/shared/version" "${DESTDIR}/${rc_libexecdir}"
 if [ "${os}" = Linux ] && [ "${sysvinit}" = yes ]; then
 	ln -s openrc-init "${DESTDIR}/${sbindir}"/init