testcase/audio: Fix audio_utc error
An error occurs when audio_utc executes twice.
because it dose not do pcm_close when end.
so added pcm_close.
@@ -1528,7 +1528,7 @@ int utc_audio_main(int argc, char *argv[])
utc_audio_pcm_mmap_read_p();
utc_audio_pcm_mmap_write_p();
#endif
-
+ clean_all_data(0, NULL);
/* after test, unlink the file */
unlink(AUDIO_TEST_FILE);
