wlantest: Build helper files with FILS support included

wlantest needs this for being able to decrypt FILS (Re)Association
Request/Response frames.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>

wlantest/Makefile

@@ -50,6 +50,7 @@ CFLAGS += -DCONFIG_IEEE80211W
 CFLAGS += -DCONFIG_IEEE80211R
 CFLAGS += -DCONFIG_HS20
 CFLAGS += -DCONFIG_DEBUG_FILE
+CFLAGS += -DCONFIG_FILS
 
 OBJS += ../src/common/ieee802_11_common.o
 OBJS += ../src/common/wpa_common.o