add audio hello

biscuit/c/audio_hello.c

@@ -0,0 +1,21 @@
+#include <common.h>
+#include <stdio.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdint.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/time.h>
+
+
+int main(int argc, char **argv)
+{
+	printf("hello audio world!\n");
+    fprintf(stdout, "stdout test ok\n");
+    fprintf(1, "stdout number test ok\n");
+    fprintf(3, "audio number test ok\n");
+	return 0;
+}