Fixes (suppresses) Visual Studio 2017 warning (error) about std::tr1.

Change-Id: I3319dfa77d00e81e48ef7ef0ab884e131e9a039e
Reviewed-on: https://swiftshader-review.googlesource.com/15048Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>