tests/qtest: Disable the spice test of readconfig-test on FreeBSD

The spice test is currently hanging on FreeBSD. It likely was
never working before, since in the past, our configure script
was failing to detect this feature due to a bug in the spice
package there (it just got enabled recently by the commit
https://cgit.freebsd.org/ports/commit/?id=cf16b1c9063351325f0 ).
To get the CI working again, let's disable the failing test for
now until someone has enough spare time to debug and fix the real
underlying problem.

Message-Id: <20230428151351.1365822-1-thuth@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/qtest/readconfig-test.c

@@ -86,8 +86,8 @@ static void test_x86_memdev(void)
     qtest_quit(qts);
 }
 
-
-#ifdef CONFIG_SPICE
+/* FIXME: The test is currently broken on FreeBSD */
+#if defined(CONFIG_SPICE) && !defined(__FreeBSD__)
 static void test_spice_resp(QObject *res)
 {
     Visitor *v;
@@ -209,7 +209,7 @@ int main(int argc, char *argv[])
         qtest_add_func("readconfig/x86/memdev", test_x86_memdev);
         qtest_add_func("readconfig/x86/ich9-ehci-uhci", test_docs_config_ich9);
     }
-#ifdef CONFIG_SPICE
+#if defined(CONFIG_SPICE) && !defined(__FreeBSD__)
     qtest_add_func("readconfig/spice", test_spice);
 #endif