updated tests to print out some debug info

tests.c

@@ -22,5 +22,6 @@ void test_dispatcher(void) {
 void test_read(void) {
 	char buf[5];
 	u32 bread = read(buf, 5);
-	printhex(bread);
+	printf("Bytes read: "); printhex(bread);
+	printf("String read: "); printf(buf);
 }