ocsp: fix vet format string issues

Fix the following format string issues reported by go vet:

  ocsp_test.go:46: Errorf format %d has arg resp.ThisUpdate of wrong type time.Time
  ocsp_test.go:50: Errorf format %d has arg resp.NextUpdate of wrong type time.Time
  ocsp_test.go:271: Errorf format %d has arg resp.ThisUpdate of wrong type time.Time
  ocsp_test.go:275: Errorf format %d has arg resp.NextUpdate of wrong type time.Time
  ocsp_test.go:279: Errorf format %d has arg resp.RevokedAt of wrong type time.Time

Change-Id: I3b516bb216424ad1777acfc27b11dc1b2d78836a
Reviewed-on: https://go-review.googlesource.com/76130
Reviewed-by: Filippo Valsorda <hi@filippo.io>

ocsp/ocsp_test.go

@@ -43,11 +43,11 @@ func TestOCSPDecode(t *testing.T) {
 	}
 
 	if !reflect.DeepEqual(resp.ThisUpdate, expected.ThisUpdate) {
-		t.Errorf("resp.ThisUpdate: got %d, want %d", resp.ThisUpdate, expected.ThisUpdate)
+		t.Errorf("resp.ThisUpdate: got %v, want %v", resp.ThisUpdate, expected.ThisUpdate)
 	}
 
 	if !reflect.DeepEqual(resp.NextUpdate, expected.NextUpdate) {
-		t.Errorf("resp.NextUpdate: got %d, want %d", resp.NextUpdate, expected.NextUpdate)
+		t.Errorf("resp.NextUpdate: got %v, want %v", resp.NextUpdate, expected.NextUpdate)
 	}
 
 	if resp.Status != expected.Status {
@@ -268,15 +268,15 @@ func TestOCSPResponse(t *testing.T) {
 			}
 
 			if !reflect.DeepEqual(resp.ThisUpdate, template.ThisUpdate) {
-				t.Errorf("resp.ThisUpdate: got %d, want %d", resp.ThisUpdate, template.ThisUpdate)
+				t.Errorf("resp.ThisUpdate: got %v, want %v", resp.ThisUpdate, template.ThisUpdate)
 			}
 
 			if !reflect.DeepEqual(resp.NextUpdate, template.NextUpdate) {
-				t.Errorf("resp.NextUpdate: got %d, want %d", resp.NextUpdate, template.NextUpdate)
+				t.Errorf("resp.NextUpdate: got %v, want %v", resp.NextUpdate, template.NextUpdate)
 			}
 
 			if !reflect.DeepEqual(resp.RevokedAt, template.RevokedAt) {
-				t.Errorf("resp.RevokedAt: got %d, want %d", resp.RevokedAt, template.RevokedAt)
+				t.Errorf("resp.RevokedAt: got %v, want %v", resp.RevokedAt, template.RevokedAt)
 			}
 
 			if !reflect.DeepEqual(resp.Extensions, template.ExtraExtensions) {