read_obu_header() should ignore unknown OBU types

Section 5.4 (Reserved OBU syntax) of the AV1 spec says:

  Note: Reserved OBUs do not have a defined syntax. The obu_type
  reserved values are reserved for future use. Decoders should ignore
  the entire OBU if they do not understand the obu_type. ...

BUG=aomedia:2840

Change-Id: I94648c613ab3ac3fddf36b883be2543e106fcbc2
diff --git a/test/test_data_util.cmake b/test/test_data_util.cmake
index bff21f7..142a137 100644
--- a/test/test_data_util.cmake
+++ b/test/test_data_util.cmake
@@ -534,7 +534,7 @@
               "invalid-oss-fuzz-10227.ivf"
               "invalid-oss-fuzz-10227.ivf.res"
               "invalid-oss-fuzz-10389.ivf"
-              "invalid-oss-fuzz-10389.ivf.res.3"
+              "invalid-oss-fuzz-10389.ivf.res.4"
               "invalid-oss-fuzz-10555.ivf"
               "invalid-oss-fuzz-10555.ivf.res"
               "invalid-oss-fuzz-10705.ivf"