test: make the ArrayStream in repl tests write a '\n'

This is more correct.
Fixes them from failing with the updated readline behavior.

test/simple/test-repl-.save.load.js

@@ -32,7 +32,7 @@ function ArrayStream() {
   this.run = function(data) {
     var self = this;
     data.forEach(function(line) {
-      self.emit('data', line);
+      self.emit('data', line + '\n');
     });
   }
 }

test/simple/test-repl-autolibs.js

@@ -28,7 +28,7 @@ function ArrayStream() {
   this.run = function (data) {
     var self = this;
     data.forEach(function (line) {
-      self.emit('data', line);
+      self.emit('data', line + '\n');
     });
   }
 }

test/simple/test-repl-tab-complete.js

@@ -30,7 +30,7 @@ function ArrayStream() {
   this.run = function(data) {
     var self = this;
     data.forEach(function(line) {
-      self.emit('data', line);
+      self.emit('data', line + '\n');
     });
   }
 }