[LNT] Python 3 support: import reduce from functools

Import reduce from functools since it was removed as a builtin in Python
3. reduce was added to functools in Python 2.6. This was produced by
running futurize's stage1 lib2to3.fixes.fix_reduce.

Reviewers: cmatthews, hubert.reinterpretcast, kristof.beyls

Reviewed By: hubert.reinterpretcast

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D67810

llvm-svn: 372477

Author: Thomas Preud'homme

lnt/util/stats.py

@@ -1,6 +1,7 @@
 from __future__ import division
 import math
 from lnt.external.stats.stats import mannwhitneyu as mannwhitneyu_large
+from functools import reduce
 
 
 def safe_min(values):