Issue 4720 - enable devenv target for Edge packager

packagerChrome.py

 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 import errno
 import glob
 import io
 import json
 import os
 import re
 from StringIO import StringIO
 import struct
 import subprocess
 import sys
+import random
 
 from packager import (readMetadata, getDefaultFileName, getBuildVersion,
                       getTemplate, Files)
 
 defaultLocale = 'en_US'
 
 
 def getIgnoredFiles(params):
     return {'store.description'}
 
@@ skipping 288 matching lines @@
     else:
         file = outputFile
     if pubkey != None and signature != None:
         file.write(struct.pack('<4sIII', 'Cr24', 2, len(pubkey), len(signature)))
         file.write(pubkey)
         file.write(signature)
     file.write(zipdata)
 
 
 def add_devenv_requirements(files, metadata, params):
-    import buildtools
-    import random
-    files.read(os.path.join(buildtools.__path__[0], 'chromeDevenvPoller__.js'),
-               relpath='devenvPoller__.js')
+    files.read(
+        os.path.join(os.path.dirname(__file__), 'chromeDevenvPoller__.js'),
+        relpath='devenvPoller__.js',
+    )
     files['devenvVersion__'] = str(random.random())
 
     if metadata.has_option('general', 'testScripts'):
         files['qunit/index.html'] = createScriptPage(
             params, 'testIndex.html.tmpl', ('general', 'testScripts')
         )
 
 
 def createBuild(baseDir, type='chrome', outFile=None, buildNum=None, releaseBuild=False, keyFile=None, devenv=False):
     metadata = readMetadata(baseDir, type)
@@ skipping 41 matching lines @@
     if devenv:
         add_devenv_requirements(files, metadata, params)
 
     zipdata = files.zipToString()
     signature = None
     pubkey = None
     if keyFile != None:
         signature = signBinary(zipdata, keyFile)
         pubkey = getPublicKey(keyFile)
     writePackage(outFile, pubkey, signature, zipdata)