systemd: fix typo in sulogin-path setting

Fix typo in sulogin-path setting. It should be ${base_sbindir} instead of
just {base_sbindir}.

(From OE-Core rev: c168f6fe35ada66f7d6d6b5151fa248230c38676)

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/systemd/systemd_237.bb

@@ -189,7 +189,7 @@ EXTRA_OEMESON += "-Dkexec-path=${sbindir}/kexec \
                   -Dmount-path=${base_bindir}/mount \
                   -Dquotacheck-path=${sbindir}/quotacheck \
                   -Dquotaon-path=${sbindir}/quotaon \
-                  -Dsulogin-path={base_sbindir}/sulogin \
+                  -Dsulogin-path=${base_sbindir}/sulogin \
                   -Dumount-path=${base_bindir}/umount"
 
 do_install() {