add modules to electron export, fix issues when downloading updates

electron/executeUtil.js

@@ -0,0 +1,20 @@
+const childProcess = require("child_process");
+
+const runFile = (folder, file, args, onExit) => {
+    childProcess.execFile(file, args, {
+        cwd: folder
+    }, (_err, _stdout, _stdin) => {
+        if (onExit) onExit();
+    })
+}
+
+const runFileDetached = (folder, file, args) => {
+    const subProcess = childProcess.spawn(file + (args ? " " + args : ''), {
+        cwd: folder,
+        detached: true,
+        stdio: 'ignore'
+    });
+    subProcess.unref();
+}
+
+module.exports = { runFile, runFileDetached };