Support/Compiler.h: MSC1600, aka VS2010, is not C++11-ready.

LLVM_HAS_CXX11_TYPETRAITS -- std::is_constructible
LLVM_HAS_CXX11_STDLIB -- std::unique_ptr

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172997 91177308-0d34-0410-b5e6-96231b3b80d8