Add set-binary-mode primitive to switch a standard stream to binary I/O.

Add set-binary-mode primitive to switch a standard stream to binary I/O.

 src/fileio.c: Include binary-io.h.
 (Fset_binary_mode): New function.
 (syms_of_fileio): Defsubr it.
 (syms_of_fileio) <Qstdin, Qstdout, Qstderr>: DEFSYM them.

 admin/unidata/unidata/uvs.el (uvs-print-table-ivd): Call set-binary-mode on
 stdout.

 doc/lispref/streams.texi (Input Functions): Document 'set-binary-mode'.
 (Output Functions): Cross-reference to documentation of
 'set-binary-mode'.

 etc/NEWS: Mention 'set-binary-mode'.