Push wpa_supplicant modules down to the leaf product config.

Since 558477c0b2a5a7db679c1ad7551d43e6364d1df2 in
external/wpa_supplicant_8 we don't need those modules if
WPA_SUPPLICANT_VERSION is not set by the BoardConfig.mk.

Change-Id: Ib5cf26814300e209590ecde2ca816e6648f00066
diff --git a/device.mk b/device.mk
index 41ae385..f1e4e41 100644
--- a/device.mk
+++ b/device.mk
@@ -29,6 +29,12 @@
 PRODUCT_AAPT_PREF_CONFIG := xhdpi
 
 PRODUCT_PACKAGES := \
+    libwpa_client \
+    hostapd \
+    wpa_supplicant \
+    wpa_supplicant.conf
+
+PRODUCT_PACKAGES += \
 	lights.msm8960
 
 PRODUCT_PACKAGES += \