msysgit - Fix issue where gcl doesn't recognize the editor.

gcl.py

Index: gcl.py
===================================================================
--- gcl.py	(revision 77893)
+++ gcl.py	(working copy)
@@ -1064,7 +1064,7 @@
   os.close(handle)
 
   if not silent:
-    os.system(GetEditor() + " " + filename)
+    subprocess.call(['env', GetEditor(), filename], shell=True)

[M-A Ruel, 2011/03/12 00:34:13]

While at it, use check_call(), and use tempfile.NamedTemporaryFile() so you
don't need to remove it manually.

 
   result = gclient_utils.FileRead(filename, 'r')
   os.remove(filename)