Add vulcanize to tools.

tools/vulcanize/node_modules/vulcanize/node_modules/cheerio/node_modules/htmlparser2/node_modules/readable-stream/examples/typer.js

Index: tools/vulcanize/node_modules/vulcanize/node_modules/cheerio/node_modules/htmlparser2/node_modules/readable-stream/examples/typer.js
diff --git a/tools/vulcanize/node_modules/vulcanize/node_modules/cheerio/node_modules/htmlparser2/node_modules/readable-stream/examples/typer.js b/tools/vulcanize/node_modules/vulcanize/node_modules/cheerio/node_modules/htmlparser2/node_modules/readable-stream/examples/typer.js
new file mode 100644
index 0000000000000000000000000000000000000000..c16eb6fb00d8d944458ddbb30fa1ac8208c6c0c5
--- /dev/null
+++ b/tools/vulcanize/node_modules/vulcanize/node_modules/cheerio/node_modules/htmlparser2/node_modules/readable-stream/examples/typer.js
@@ -0,0 +1,17 @@
+var fs = require('fs');
+var fst = fs.createReadStream(__filename);
+var Readable = require('../readable.js');
+var rst = new Readable();
+rst.wrap(fst);
+
+rst.on('end', function() {
+  process.stdin.pause();
+});
+
+process.stdin.setRawMode(true);
+process.stdin.on('data', function() {
+  var c = rst.read(3);
+  if (!c) return setTimeout(process.exit, 500)
+  process.stdout.write(c);
+});
+process.stdin.resume();