Add <functional> header needed for std::bind2nd() function.

Without this header, VS2012 compilation fails.

Change-Id: Ie1d6afeace981a4a1211f3bb6e4356223ffc38ef
Merge topic 'FixMissingSTLHeaderForH5PartReader' into next

9d0ccd5 Add <functional> header needed for std::bind2nd() function.