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: I94193f8a0e772f86912eeb209f4a6359159c5cc1
diff --git a/device.mk b/device.mk
index 1a73c56..0154a01 100644
--- a/device.mk
+++ b/device.mk
@@ -78,6 +78,12 @@
 PRODUCT_COPY_FILES += \
     device/samsung/manta/audio_policy.conf:system/etc/audio_policy.conf
 
+PRODUCT_PACKAGES := \
+    libwpa_client \
+    hostapd \
+    wpa_supplicant \
+    wpa_supplicant.conf
+
 # audio effects
 PRODUCT_PACKAGES += libaudience_voicefx
 PRODUCT_COPY_FILES += \