[tex-live] biber in cygwin64 tl2016 builds

[David Carlisle]

Sorry, the empty file was just a minimal example, this also hangs (I
think _any_ input file hangs)

\documentclass{article}
\usepackage[
    backend=biber
]{biblatex}
\addbibresource{biblatex-examples.bib}
\begin{document}
testing: \cite{sigfridsson}
\printbibliography
\end{document}