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: Ibb786065da6d1a12159945f415102f6a9704e248
diff --git a/device.mk b/device.mk
index ebb80ed..a4cfef1 100644
--- a/device.mk
+++ b/device.mk
@@ -26,8 +26,14 @@
     device/asus/flo/fstab.flo:root/fstab.flo \
     device/asus/flo/init.flo.rc:root/init.flo.rc
 
+PRODUCT_PACKAGES := \
+    libwpa_client \
+    hostapd \
+    wpa_supplicant \
+    wpa_supplicant.conf
+
 PRODUCT_PACKAGES += \
-	camera.flo
+    camera.flo
 
 # NFC
 PRODUCT_PACKAGES += \