meta-systemd: restore wpa-supplicant bbappend

* systemd support in oe-core does not work for everybody

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-systemd/oe-core/recipes-connectivity/wpa-supplicant/wpa-supplicant_2.0.bbappend

@@ -0,0 +1,15 @@
+PRINC := "${@int(PRINC) + 2}"
+
+inherit systemd
+
+SYSTEMD_PACKAGES = "${PN}-systemd"
+SYSTEMD_SERVICE = "wpa_supplicant.service"
+SYSTEMD_AUTO_ENABLE = "disable"
+
+do_install_append () {
+    install -d ${D}${systemd_unitdir}/system
+    install -m 644 ${S}/systemd/*.service ${D}${systemd_unitdir}/system
+}
+
+# systemd.bbclass does not catch all multiple-instance-service-files
+FILES_${PN}-systemd += "${systemd_unitdir}/system/"