bhyve: Fix build

Continuous integration caught that although 'make syntax-check' was
sufficient to let me be aware that I had to change bhyve to use
s/virDomainShutdownEnsureACL/virDomainShutdownFlagsEnsureACL/, it was
not sufficient to note which ACL functions require 2 vs. 3 arguments
for flag validation.

Fixes: eded8aadSigned-off-by: NEric Blake <eblake@redhat.com>

src/bhyve/bhyve_driver.c

@@ -1027,7 +1027,7 @@ bhyveDomainShutdownFlags(virDomainPtr dom, unsigned int flags)
     if (!(vm = bhyveDomObjFromDomain(dom)))
         goto cleanup;
 
-    if (virDomainShutdownFlagsEnsureACL(dom->conn, vm->def) < 0)
+    if (virDomainShutdownFlagsEnsureACL(dom->conn, vm->def, flags) < 0)
         goto cleanup;
 
     if (virDomainObjCheckActive(vm) < 0)