clean missed some test files

Makefile

@@ -88,6 +88,8 @@ clean:
 	rm test-tcpserver -rf
 	rm test-tcpclient -rf
 	rm test-webserver -rf
+	rm test-getrandom -rf
+	rm test-base64 -rf
 	rm test-json -rf
 	rm test-udp -rf
 	rm test-ssl -rf