golang: Add filterAttrLog getter/setters test

Update TestFilterAttributeGettersAndSetters() to set the log filter flag
and then verify its value.

The log filter flag is not tested when libseccomp is not new enough to
support API level operations.

Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Signed-off-by: Matthew Heon <mheon@redhat.com>

seccomp_test.go

@@ -432,6 +432,38 @@ func TestFilterAttributeGettersAndSetters(t *testing.T) {
 		t.Errorf("No new privileges bit was not set correctly")
 	}
 
+	if ApiLevelIsSupported() {
+		api, err := GetApi()
+		if err != nil {
+			t.Errorf("Error getting API level: %s", err)
+		} else if api < 3 {
+			err = SetApi(3)
+			if err != nil {
+				t.Errorf("Error setting API level: %s", err)
+			}
+		}
+	}
+
+	err = filter.SetLogBit(true)
+	if err != nil {
+		if !ApiLevelIsSupported() {
+			t.Logf("Ignoring failure: %s\n", err)
+		} else {
+			t.Errorf("Error setting log bit")
+		}
+	}
+
+	log, err := filter.GetLogBit()
+	if err != nil {
+		if !ApiLevelIsSupported() {
+			t.Logf("Ignoring failure: %s\n", err)
+		} else {
+			t.Errorf("Error getting log bit")
+		}
+	} else if log != true {
+		t.Errorf("Log bit was not set correctly")
+	}
+
 	err = filter.SetBadArchAction(ActInvalid)
 	if err == nil {
 		t.Errorf("Setting bad arch action to an invalid action should error")