tests: Run virnetdaemontest iff WITH_YAJL

The test itself and daemon require a JSON parsing library. If not
present, skip the test.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

tests/virnetdaemontest.c

@@ -26,7 +26,7 @@
 
 #define VIR_FROM_THIS VIR_FROM_RPC
 
-#ifdef HAVE_SOCKETPAIR
+#if defined(HAVE_SOCKETPAIR) && defined(WITH_YAJL)
 static virNetServerPtr
 testCreateServer(const char *host, int family)
 {