dbus_1.10.2.bb: fix path to systemctl

When compiling with systemd, pam and user sessions, the resulting
/usr/lib/systemd/user/dbus.socket ensures that the right
DBUS_SESSION_BUS_ADDRESS gets put into the environment when logging
into the system.

The default configure behavior is to look in the PATH, which picks up
the tool from the host sysroot. We need to override that so that the
final location on the target is used instead. This is only relevant at
the moment when enabling user sessions, but it makes sense to fix the
value in all cases.

Signed-off-by: Patrick Ohly <patrick.ohly@intel.com>

meta/recipes-core/dbus/dbus_1.10.2.bb

@@ -96,6 +96,10 @@ EXTRA_OECONF = "--disable-tests \
 
 EXTRA_OECONF_append_class-native = " --disable-selinux"
 
+# Automatic detection in the configure script picks up the path to
+# the native tool, therefore we must override the automatism.
+EXTRA_OECONF_append_class-target = " SYSTEMCTL=${base_bindir}/systemctl"
+
 PACKAGECONFIG ??= "${@bb.utils.contains('DISTRO_FEATURES', 'systemd', 'systemd', '', d)} \
                    ${@bb.utils.contains('DISTRO_FEATURES', 'x11', 'x11', '', d)}"
 PACKAGECONFIG_class-native = ""