wsd: move LOOLProtocol::tokenize to Util::tokenize

The tokenizer(s) are more generic than the protocol
logic, and are used from contexts that don't involve
the protocol as such.

Change-Id: Ie8c256bf11a91e466bff794021f41603c9596a7f

tools/KitClient.cpp

@@ -88,7 +88,7 @@ protected:
             std::string line;
             std::getline(std::cin, line);
 
-            StringVector tokens(LOOLProtocol::tokenize(line, ' '));
+            StringVector tokens(Util::tokenize(line, ' '));
 
             if (tokens.size() == 0)
                 continue;