fuuko/dnsmasq: Allow DNS queries over TCP

Sharepoint manages to return enormous responses when querying for an
AAAA record.

$ dig sitename.sharepoint.com AAAA
;; Truncated, retrying in TCP mode.

machines/fuuko/services/dnsmasq.nix

@@ -34,4 +34,5 @@
   };
 
   networking.firewall.allowedUDPPorts = [ 53 67 ];
+  networking.firewall.allowedTCPPorts = [ 53 ];
 }