Fix setup ember app script

Previous script changes unexpectedly.

Before;
``` diff
$ g df config/environment.js
diff --git a/config/environment.js b/config/environment.js
index 5513a9a..772ff99 100644
--- a/config/environment.js
+++ b/config/environment.js
@@ -5,7 +5,7 @@ module.exports = function (environment) {
     modulePrefix: 'my-app',
     environment,
     rootURL: '/',
-    locationType: 'auto',
+    locationType: 'hash',
     EmberENV: {
       FEATURES: {
         // Here you can enable experimental features on an ember canary build
@@ -40,7 +40,7 @@ module.exports = function (environment) {
     ENV.APP.LOG_VIEW_LOOKUPS = false;

     ENV.APP.rootElement = '#ember-testing';
-    ENV.APP.autoboot = false;
+    ENV.APP.hashboot = false;
   }

   if (environment === 'production') {
```

After
``` diff
diff --git a/config/environment.js b/config/environment.js
index 5513a9a..6b7495e 100644
--- a/config/environment.js
+++ b/config/environment.js
@@ -5,7 +5,7 @@ module.exports = function (environment) {
     modulePrefix: 'my-app',
     environment,
     rootURL: '/',
-    locationType: 'auto',
+    locationType: 'hash',
     EmberENV: {
       FEATURES: {
         // Here you can enable experimental features on an ember canary build
```

bin/setup_ember

@@ -9,7 +9,7 @@ setup_ember() {
     git clone -b 'v4.0.0' https://github.com/ember-cli/ember-new-output.git $target
 
     echo '-- Make router catchall routes'
-    sed -i -e 's/auto/hash/' $target/config/environment.js
+    sed -i -e "s/'auto'/'hash'/" $target/config/environment.js
 
     echo '-- Add an image to a template'
     cp spec/fixtures/application.hbs $target/app/templates/application.hbs