Use universal EOL conversion when calling the text editor in gcl.

gcl.py

Index: gcl.py
diff --git a/gcl.py b/gcl.py
index 0c8fbb61ef35a255dbfebb69d0bc36baae048320..dffc566330e5934fb9e0ea87eb12141dfd1d9c8f 100755
--- a/gcl.py
+++ b/gcl.py
@@ -532,7 +532,7 @@ class ChangeInfo(object):
       if fail_on_not_found:
         ErrorExit("Changelist " + changename + " not found.")
       return ChangeInfo(changename, 0, 0, '', None, local_root, None, False)
-    content = gclient_utils.FileRead(info_file, 'r')
+    content = gclient_utils.FileRead(info_file)
     save = False
     try:
       values = ChangeInfo._LoadNewFormat(content)
@@ -1137,7 +1137,7 @@ def CMDchange(args):
         subprocess2.check_call(cmd, shell=True)
       except subprocess2.CalledProcessError, e:
         ErrorExit('Editor returned %d' % e.returncode)
-    result = gclient_utils.FileRead(filename, 'r')
+    result = gclient_utils.FileRead(filename)
   finally:
     os.remove(filename)