Keep the order of iface attributes the same accross rubies

1.8 doesn't maintain insertion order for Hash keys like 1.9 does so we
end up with ~random order for the display with the previous technique.
Switch to an Array instead of a Hash so it's always the same.

lib/rex/post/meterpreter/extensions/stdapi/net/interface.rb

@@ -47,19 +47,19 @@ class Interface
 		mac_addr.each_byte { |o| macocts << o }
 		macocts += [0] * (6 - macocts.size) if macocts.size < 6
 
-		info = {
-			"Name"         => mac_name,
-			"Hardware MAC" => sprintf("%02x:%02x:%02x:%02x:%02x:%02x",
+		info = [
+			["Name"         , mac_name  ],
+			["Hardware MAC" , sprintf("%02x:%02x:%02x:%02x:%02x:%02x",
 				macocts[0], macocts[1], macocts[2],
-				macocts[3], macocts[4], macocts[5]),
-			"MTU"          => mtu,
-			"Flags"        => flags,
-			"IPv4 Address" => ((ip and ip != "0.0.0.0") ? ip : nil),
-			"IPv4 Netmask" => netmask,
-			"IPv6 Address" => ((ip6 and ip6 != "::") ? ip6 : nil),
-			"IPv6 Netmask" => netmask6,
-		}
-		pad = info.keys.max_by{|k|k.length}.length
+				macocts[3], macocts[4], macocts[5])],
+			["MTU"          , mtu       ],
+			["Flags"        , flags     ],
+			["IPv4 Address" , ((ip and ip != "0.0.0.0") ? ip : nil) ],
+			["IPv4 Netmask" , netmask   ],
+			["IPv6 Address" , ((ip6 and ip6 != "::") ? ip6 : nil) ],
+			["IPv6 Netmask" , ((netmask6 and netmask6 != "::") ? netmask6 : nil) ],
+		]
+		pad = info.map{|i| i[0] }.max_by{|k|k.length}.length
 
 		ret = sprintf(
 				"Interface %2d\n" +