Update codec name in test enviroment to match decoder

The codec name is defined in av1_dx_iface.c
This name needs to match kAV1Name in decode_test_driver.cc.
Otherwise the EndtoEndPSNRTest fails when built with --enable-ext-tile,
(because we need the IsAV1 function to return true.)

Change-Id: I05d5ea5b6fd4bbd49e8bcacd047fb81c27efb3b3
diff --git a/test/decode_test_driver.cc b/test/decode_test_driver.cc
index 3177769..95a0eb5 100644
--- a/test/decode_test_driver.cc
+++ b/test/decode_test_driver.cc
@@ -19,7 +19,7 @@
 namespace libaom_test {
 
 const char kVP8Name[] = "WebM Project VP8";
-const char kAV1Name[] = "WebM Project AV1";
+const char kAV1Name[] = "AOMedia Project AV1 Decoder";
 
 aom_codec_err_t Decoder::PeekStream(const uint8_t *cxdata, size_t size,
                                     aom_codec_stream_info_t *stream_info) {