Fix wpa_supplicant compilation after adding eap_user database

Commit ee431d77a51b361b4697f2b737bcf46a1860a6fe broke wpa_supplicant
compilation:

../src/ap/ieee802_1x.o: In function `ieee802_1x_get_eap_user':
/../src/ap/ieee802_1x.c:1689: undefined reference to `hostapd_get_eap_user'
collect2: error: ld returned 1 exit status
make: *** [wpa_supplicant] Error 1

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>

wpa_supplicant/Makefile

@@ -721,6 +721,7 @@ OBJS += ../src/ap/ieee802_11_shared.o
 OBJS += ../src/ap/drv_callbacks.o
 OBJS += ../src/ap/ap_drv_ops.o
 OBJS += ../src/ap/beacon.o
+OBJS += ../src/ap/eap_user_db.o
 ifdef CONFIG_IEEE80211N
 OBJS += ../src/ap/ieee802_11_ht.o
 endif