TBR: x/ref: update for v.io/c/12564

MultiPart: 2/2
Change-Id: I2947aead3b93fecf96ae41a706de01b6ad706cc2
diff --git a/runtime/internal/rt/rt_test.go b/runtime/internal/rt/rt_test.go
index e695718..94bf51a 100644
--- a/runtime/internal/rt/rt_test.go
+++ b/runtime/internal/rt/rt_test.go
@@ -35,7 +35,7 @@
 	l := vlog.Log
 	fmt.Println(l)
 	args := fmt.Sprintf("%s", l)
-	expected := regexp.MustCompile("name=vlog logdirs=\\[/tmp\\] logtostderr=true|false alsologtostderr=false|true max_stack_buf_size=4292608 v=[0-9] stderrthreshold=2 vmodule= log_backtrace_at=:0")
+	expected := regexp.MustCompile("name=vlog logdirs=\\[/tmp\\] logtostderr=true|false alsologtostderr=false|true max_stack_buf_size=4292608 v=[0-9] stderrthreshold=2 vmodule= vfilepath= log_backtrace_at=:0")
 	if !expected.MatchString(args) {
 		t.Errorf("unexpected default args: %s, want %s", args, expected)
 	}
@@ -84,6 +84,7 @@
 		"v=0 "+
 		"stderrthreshold=2 "+
 		"vmodule=*=3 "+
+		"vfilepath= "+
 		"log_backtrace_at=:0",
 		os.TempDir()))
 	h.CloseStdin()