Fix build with -DCONFIG_WEBM_IO=0 -DCONFIG_LOWBITDEPTH=0

BUG=aomedia:2223

Change-Id: I3788c98a15ebe8ba1a7f1667fbb7dc1e7550776b
diff --git a/test/external_frame_buffer_test.cc b/test/external_frame_buffer_test.cc
index 3b0d472..665137e 100644
--- a/test/external_frame_buffer_test.cc
+++ b/test/external_frame_buffer_test.cc
@@ -9,7 +9,7 @@
  */
 
 #include <string>
-
+#include "common/tools_common.h"
 #include "config/aom_config.h"
 #include "test/codec_factory.h"
 #include "test/decode_test_driver.h"