Issue #3812: Failed to build python if configure --without-threads.
Removed itertools usage from Lib/traceback.py, because itertools
is extension module, so maybe unavailable on build process.
(Lib/_dummy_thread.py uses Lib/traceback.py)
Reviewed by Amaury Forgeot d'Arc.
diff --git a/Misc/NEWS b/Misc/NEWS
index 2a54c0c..7dde481 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -165,6 +165,8 @@
Build
-----
+- Issue #3812: Failed to build python if configure --without-threads.
+
- Issue #3791: Remove the bsddb module from the Windows installer, and the
core bsddb library from the Windows build files.