Switch devenv to use pkg packages

ports/devenv/tests/devenv_large_test.js

 /*
  * Copyright (c) 2014 The Native Client Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 'use strict';
 
 // Install several packages.
 // This test must be run before any tests that use these packages.
 TEST_F(DevEnvTest, 'testPackageInstall', function() {
   var self = this;
   return Promise.resolve().then(function() {
+    return self.installPackage('corelibs');
+  }).then(function() {
     return self.installPackage('coreutils');
   }).then(function() {
     return self.installPackage('git');
   }).then(function() {
     return self.installPackage('make');
   }).then(function() {
     return self.installPackage('python');
   }).then(function() {
     return self.installPackage('curl');
   });
@@ skipping 267 matching lines @@
        'curl https://nacltools.storage.googleapis.com/io2014/voronoi.zip -O');
   }).then(function() {
     return self.checkCommand('unzip voronoi.zip');
   }).then(function() {
     return self.readFile('/home/user/voronoi/Makefile');
   }).then(function(data) {
     // Check there's something in the makefile.
     ASSERT_GT(data.length, 100);
   });
 });