sudo: Set vardir deterministically

Without setting this it will vary depending on which directories are present
on the host.

[YOCTO #13775]

(From OE-Core rev: 39fe849b56d70689846262c31ab7c182c8443923)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/sudo/sudo_1.8.29.bb

@@ -17,6 +17,7 @@ EXTRA_OECONF += " \
              ac_cv_type_rsize_t=no \
              ${@bb.utils.contains('DISTRO_FEATURES', 'pam', '--with-pam', '--without-pam', d)} \
              ${@bb.utils.contains('DISTRO_FEATURES', 'systemd', '--enable-tmpfiles.d=${nonarch_libdir}/tmpfiles.d', '--disable-tmpfiles.d', d)} \
+             --with-vardir=/var/lib/sudo \
              "
 
 do_install_append () {