qemucapabilitiestest: Add support for '+hvf' variant

We need to signal to the capabilities code that HVF variant is used so
that it can behave as if it were running on OSX.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>

tests/qemucapabilitiestest.c

@@ -44,11 +44,12 @@ struct _testQemuData {
     int ret;
 };
 
+bool isHVF = false;
 
 bool
 virQEMUCapsProbeHVF(virQEMUCaps *qemuCaps G_GNUC_UNUSED)
 {
-    return false;
+    return isHVF;
 }
 
 
@@ -97,6 +98,8 @@ testQemuCaps(const void *opaque)
                                                NULL)))
         return -1;
 
+    isHVF = STREQ(data->variant, "+hvf");
+
     if (qemuProcessQMPInitMonitor(qemuMonitorTestGetMonitor(mon)) < 0)
         return -1;