fix -m test

ci/test-14-ping-internet-hosts.pl

@@ -53,10 +53,13 @@ SKIP: {
 }
 
 # fping -m
-{
-my $cmd = Test::Command->new(cmd => "fping -m google-public-dns-a.google.com");
+SKIP: {
+    if(system("/sbin/ifconfig | grep inet6.*Scope:Global") != 0) {
+        skip 'No IPv6 on this host', 3;
+    }
+    my $cmd = Test::Command->new(cmd => "fping -A -m google-public-dns-a.google.com");
     $cmd->exit_is_num(0);
-$cmd->stdout_is_eq("google-public-dns-a.google.com is alive\n");
+    $cmd->stdout_is_eq("2001:4860:4860::8888 is alive\n8.8.8.8 is alive\n");
     $cmd->stderr_is_eq("");
 }