wireless-tools: add CPPFLAGS

Add the OpenWrt CPPFLAGS to the CFLAGS. wireless-tools does not
support CPPFLAGS. This fixes fortify sources support.

Link: https://github.com/openwrt/openwrt/pull/22056
Signed-off-by: Hauke Mehrtens <[email protected]>

package/network/utils/wireless-tools/Makefile

@@ -59,7 +59,7 @@ define Build/Compile
 	mkdir -p $(PKG_INSTALL_DIR)
 	$(MAKE) -C $(PKG_BUILD_DIR) \
 		$(TARGET_CONFIGURE_OPTS) \
-		CFLAGS="$(TARGET_CFLAGS) -I." \
+		CFLAGS="$(TARGET_CFLAGS) $(TARGET_CPPFLAGS) -I." \
 		LDFLAGS="$(TARGET_LDFLAGS)" \
 		BUILD_WE_ESSENTIAL=y \
 		LIBS="-lm -Wl,--gc-sections" \