wpa_supplicant/Makefile: Fix libwpa_client build

Building libwpa_client requires src/utils/common.c for bin_clear_free()
else loading the library fails with:

Error relocating /usr/lib/libwpa_client.so: bin_clear_free: symbol not found

Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>

wpa_supplicant/Makefile

@@ -1706,9 +1706,11 @@ wpa_cli: $(OBJS_c)
 
 LIBCTRL += ../src/common/wpa_ctrl.o
 LIBCTRL += ../src/utils/os_$(CONFIG_OS).o
+LIBCTRL += ../src/utils/common.o
 LIBCTRL += ../src/utils/wpa_debug.o
 LIBCTRLSO += ../src/common/wpa_ctrl.c
 LIBCTRLSO += ../src/utils/os_$(CONFIG_OS).c
+LIBCTRLSO += ../src/utils/common.c
 LIBCTRLSO += ../src/utils/wpa_debug.c
 
 libwpa_client.a: $(LIBCTRL)