udev: add missing comment for toolchain option dependencies

Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/udev/Config.in

@@ -43,3 +43,7 @@ endif
 comment "udev requires /dev mgmnt set to udev under System configuration"
 	depends on !BR2_avr32
 	depends on !BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_UDEV
+
+comment "udev needs a toolchain w/ largefile, wchar, dynamic library"
+	depends on !BR2_avr32
+	depends on !BR2_LARGEFILE || !BR2_USE_WCHAR || BR2_PREFER_STATIC_LIB