Fix #13210. Port the Windows build from VS2008 to VS2010.
diff --git a/Tools/buildbot/external-common.bat b/Tools/buildbot/external-common.bat
index 244d5f5..118871c 100644
--- a/Tools/buildbot/external-common.bat
+++ b/Tools/buildbot/external-common.bat
@@ -30,11 +30,11 @@
 if not exist openssl-1.0.0a svn export http://svn.python.org/projects/external/openssl-1.0.0a
 
 @rem tcl/tk
-if not exist tcl-8.5.9.0 (
+if not exist tcl-8.5.11.0 (
    rd /s/q tcltk tcltk64
-   svn export http://svn.python.org/projects/external/tcl-8.5.9.0
+   svn export http://svn.python.org/projects/external/tcl-8.5.11.0
 )
-if not exist tk-8.5.9.0 svn export http://svn.python.org/projects/external/tk-8.5.9.0
+if not exist tk-8.5.11.0 svn export http://svn.python.org/projects/external/tk-8.5.11.0
 
 @rem sqlite3
 if not exist sqlite-3.7.4 (