tools: Remove a double words

- s/to to/to/
 - s/to to/to do/ in an error message

MFC after:	3 days

tools/tools/netmap/pkt-gen.c

@@ -2809,7 +2809,7 @@ tap_alloc(char *dev)
 
 	/* try to create the device */
 	if( (err = ioctl(fd, TUNSETIFF, (void *) &ifr)) < 0 ) {
-		D("failed to to a TUNSETIFF: %s", strerror(errno));
+		D("failed to do a TUNSETIFF: %s", strerror(errno));
 		close(fd);
 		return err;
 	}

tools/tools/netrate/tcpp/tcpp_server.c

@@ -54,7 +54,7 @@
  * Server side -- create a pool of processes, each listening on its own TCP
  * port number for new connections.  The first 8 bytes of each connection
  * will be a network byte order length, then there will be that number of
- * bytes of data.  We use non-blocking sockets with kqueue to to avoid the
+ * bytes of data.  We use non-blocking sockets with kqueue to avoid the
  * overhead of threading or more than one process per processor, which makes
  * things a bit awkward when dealing with data we care about.  As such, we
  * read into a small character buffer which we then convert to a length once