Reference: http://lists.cs.uiuc.edu/pipermail/cfe-commits/Week-of-Mon-20130325/077131.html

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@178544 91177308-0d34-0410-b5e6-96231b3b80d8
Reference: http://lists.cs.uiuc.edu/pipermail/cfe-commits/Week-of-Mon-20130325/077132.html

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@178545 91177308-0d34-0410-b5e6-96231b3b80d8