Build failue for converters/libetonyek

[Paul Goyette <paul%whooppee.com@localhost>]

With a amd64 host running NetBSD 9.99.59, and with all dependencies 
having already been built clean into an initially empty sandbox, and 
with an up-to-date version of pkgsrc, I'm seeing the following error:

...
NUM3Parser.cpp: In member function 'virtual bool libetonyek::NUM3Parser::parseDocument()':
NUM3Parser.cpp:46:8: error: 'for_each' is not a member of 'std'
   std::for_each(sheetListRefs.begin(), sheetListRefs.end(), std::bind(&NUM3Parser::parseSheet, this, std::placeholders::_1));
        ^~~~~~~~
NUM3Parser.cpp:46:8: note: suggested alternative: 'forward'
   std::for_each(sheetListRefs.begin(), sheetListRefs.end(), std::bind(&NUM3Parser::parseSheet, this, std::placeholders::_1));
        ^~~~~~~~
        forward
...

This error is repeatable...

+--------------------+--------------------------+-----------------------+
| Paul Goyette       | PGP Key fingerprint:     | E-mail addresses:     |
| (Retired)          | FA29 0E3B 35AF E8AE 6651 | paul%whooppee.com@localhost     |
| Software Developer | 0786 F758 55DE 53BA 7731 | pgoyette%netbsd.org@localhost   |
+--------------------+--------------------------+-----------------------+