GUB update

[Phil Holmes]

With huge thanks to Masamichi, I am within a whisker of getting GUB working
again.  I've built binaries and regtest comparisons, but I'm just failing on
the docs right now.  The error is in trying to build collated-files.  From
lilypond-doc.log I get:

Please check the logfile collated-files.texi2pdf.log for errors

>From that file I get:

(./45/lily-0885bf77.texidoc
kpathsea: Running mktextfm ecrm1095
mktextfm: Running mf-nowin -progname=mf \mode:=ljfour; mag:=1; nonstopmode;
input ecrm1095
This is METAFONT, Version 2.718281 (TeX Live 2013/Debian)

kpathsea: Running mktexmf ecrm1095

! I can't find file `ecrm1095'.
<*> ...ljfour; mag:=1; nonstopmode; input ecrm1095
                                                  
Please type another input file name
! Emergency stop.

The 0885bf77 lilypond file is:

"Between notes, there may be simple glissando lines.
Here, the first two glissandi are not consecutive.

The engraver does no time-keeping, so it involves some trickery to get
<< @{ s8 s8 s4 @} @{ c4 \gliss d4 @} >> working correctly."

Anyone any idea what's causing this?