tests: remove tmp files on OK live_test.v run

vlib/v/tests/live_test.v

@@ -37,6 +37,8 @@ const (
 	res_changed_file    = os.join_path(os.temp_dir(), 'CHANGED.txt')
 	res_another_file    = os.join_path(os.temp_dir(), 'ANOTHER.txt')
 	res_stop_file       = os.join_path(os.temp_dir(), 'STOP.txt')
+	cleanup_files       = [tmp_file, source_file, genexe_file, output_file, res_original_file,
+		res_changed_file, res_another_file, res_stop_file]
 	live_program_source = "
 module main
 
@@ -158,6 +160,9 @@ fn testsuite_end() {
 	assert histogram['ORIGINAL'] > 0
 	assert histogram['CHANGED'] + histogram['ANOTHER'] > 0
 	// assert histogram['END'] > 0
+	for tfile in cleanup_files {
+		os.rm(tfile)
+	}
 }
 
 fn change_source(new string) {