wpa-supplicant: add systemd support

* native systemd support came in with v1.0 [1]
* needs [2] to work properly
* mends my wlan under control of networkmanager

[1] http://hostap.epitest.fi/gitweb/gitweb.cgi?p=hostap-1.git;a=blob_plain;f=wpa_supplicant/ChangeLog
[2] http://patches.openembedded.org/patch/34335/

Signed-off-by: Andreas Müller <schnitzeltony@googlemail.com>
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>

meta-oe/recipes-connectivity/wpa-supplicant/wpa-supplicant_1.0.bbappend

@@ -1,3 +0,0 @@
-FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
- 
-PRINC = "1"

meta-systemd/oe-core/recipes-connectivity/wpa-supplicant/wpa-supplicant_1.0.bbappend

@@ -0,0 +1,15 @@
+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/"