Use process.execPath to spawn node subprocess (facebook#8694)

Author: anuraaga

packages/react-dev-utils/openBrowser.js

@@ -45,7 +45,7 @@ function getBrowserEnv() {
 
 function executeNodeScript(scriptPath, url) {
   const extraArgs = process.argv.slice(2);
-  const child = spawn('node', [scriptPath, ...extraArgs, url], {
+  const child = spawn(process.execPath, [scriptPath, ...extraArgs, url], {
     stdio: 'inherit',
   });
   child.on('close', code => {

packages/react-scripts/bin/react-scripts.js

@@ -26,7 +26,7 @@ const nodeArgs = scriptIndex > 0 ? args.slice(0, scriptIndex) : [];
 
 if (['build', 'eject', 'start', 'test'].includes(script)) {
   const result = spawn.sync(
-    'node',
+    process.execPath,
     nodeArgs
       .concat(require.resolve('../scripts/' + script))
       .concat(args.slice(scriptIndex + 1)),