Merging r244003:
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r244003 | tbrethou | 2015-08-04 20:59:14 -0700 (Tue, 04 Aug 2015) | 2 lines

Update references to lists.llvm.org

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/branches/release_37@244772 91177308-0d34-0410-b5e6-96231b3b80d8