[newlib][manuals] Manuals failing to build on Ubuntu LTS 14.04

[Andre Vieira <Andre dot SimoesDiasVieira at arm dot com>]

Hello,

Building the manuals on Ubuntu LTS 14.04 (64-bit) using pdfTeX 
3.1415926-2.5-1.40.14 (TeX Live 2013/Debian) is failing with the 
following error:
"Transcript written on libc.log.
/usr/bin/texi2dvi: pdfetex exited with bad status, quitting."

libc.log complaints about the following:

You can't use `@unskip' in vertical mode.

@*->@unskip

            @hfil @break @hbox {}@ignorespaces

For stdio/sscanf.def:275, stdio/swscanf.def:263 and time/strftime.def:213.

These are all occurrences of an '@end table' (or o- in the original 
c-file) followed by some white lines and:
 @*
 @strong{Returns}@*

(these correspond to a newline and RETURNS, in the original c-file).

This code has been around for a while, so it might have to do with a 
change in pdfTex?

Best Regards,
Andre