JavaScript: Use synchronous APIs in examples for js/shell-command-constructed-from-input.

Author: max-schaefer

javascript/ql/src/Security/CWE-078/examples/unsafe-shell-command-construction.js

@@ -1,5 +1,5 @@
 var cp = require("child_process");
 
 module.exports = function download(path, callback) {
-  cp.exec("wget " + path, callback);
+  cp.execSync("wget " + path, callback);
 }

javascript/ql/src/Security/CWE-078/examples/unsafe-shell-command-construction_fixed.js

@@ -1,5 +1,5 @@
 var cp = require("child_process");
 
 module.exports = function download(path, callback) {
-  cp.execFile("wget", [path], callback);
+  cp.execFileSync("wget", [path], callback);
 }