dropping close's dependency on fclose broke Octave's build system

[Jordi Gutiérrez Hermoso]

See this discussion:

     http://octave.1599824.n4.nabble.com/Bootstrap-fails-tp3690747p3690963.html

Not sure if we're doing something wrong in Octave with gnulib or if
it's on your side.

Thanks,
- Jordi G. H.