make web external_binary

[Graham Percival]

Fresh git,
cp GNUmakefile.in GNUmakefile
make 
LILYPOND_EXTERNAL_BINARY=~/Apps/LilyPond.app/Contents/Resources/bin/lilypond 
LILYPOND_BOOK_LILYPOND_FLAGS= web


result (died very close to the beginning, after processing input/*.ly )
...
LANG= makeinfo  --enable-encoding -I ./out-www 
--output=out-www/collated-files.html 
--css-include=/Users/gperciva/usr/src/lilypond/Documentation/texinfo.css 
--html --no-split --no-headers out-www/collated-files.texi
out-www/collated-files.texi: No such file or directory
make[3]: *** [out-www/collated-files.html] Error 1
make[2]: *** [WWW] Error 2
make[1]: *** [WWW] Error 2
make: *** [web] Error 2
2007-01-05 09:57:45.003 open[1175] No such file: 
/Users/gperciva/usr/src/lilypond/out-www/lilypond/index.html