dist failure for gub

[Graham Percival]

The dist check for gub is failing with the below message.  Generally I
can fix these things by just adding a file or two to EXTRA_DIST, but
this looks more complicated.  Any ideas?
(oh... might it need some cleaning?  Are those files included in "make
clean" / should they be?)

Cheers,
- Graham


ln: creating hard link
`/main/src/gub/target/linux-x86/build/lilypond-git.sv.gnu.org--lilypond.git-release-unstable/./out/lilypond-2.13.27//input/regression/lilypond-book/suffix-tely.tely':
File exists
ln: creating hard link
`/main/src/gub/target/linux-x86/build/lilypond-git.sv.gnu.org--lilypond.git-release-unstable/./out/lilypond-2.13.27//input/regression/lilypond-book/texinfo-include-language-detection.tely':
File exists
ln: creating hard link
`/main/src/gub/target/linux-x86/build/lilypond-git.sv.gnu.org--lilypond.git-release-unstable/./out/lilypond-2.13.27//input/regression/lilypond-book/texinfo-language-detection.tely':
File exists
ln: creating hard link
`/main/src/gub/target/linux-x86/build/lilypond-git.sv.gnu.org--lilypond.git-release-unstable/./out/lilypond-2.13.27//input/regression/lilypond-book/suffix-texi.texi':
File exists
make[8]: *** [local-dist] Error 1
make[8]: Leaving directory
`/main/src/gub/target/linux-x86/build/lilypond-git.sv.gnu.org--lilypond.git-release-unstable/input/regression/lilypond-book'
make[7]: *** [local-dist] Error 2
make[7]: Leaving directory
`/main/src/gub/target/linux-x86/build/lilypond-git.sv.gnu.org--lilypond.git-release-unstable/input/regression'
make[6]: *** [local-dist] Error 2
make[6]: Leaving directory
`/main/src/gub/target/linux-x86/build/lilypond-git.sv.gnu.org--lilypond.git-release-unstable/input'
make[5]: *** [local-dist] Error 2
make[5]: Leaving directory
`/main/src/gub/target/linux-x86/build/lilypond-git.sv.gnu.org--lilypond.git-release-unstable'
make[4]: *** [dist] Error 2
make[4]: Leaving directory
`/main/src/gub/target/linux-x86/build/lilypond-git.sv.gnu.org--lilypond.git-release-unstable'
Traceback (most recent call last):
  File "test-lily/dist-check.py", line 137, in <module>
    main ()
  File "test-lily/dist-check.py", line 129, in main
    system ('cd %(builddir)s/ && make DOCUMENTATION=yes dist' % locals ())
  File "test-lily/dist-check.py", line 56, in system
    raise Exception ('failed')
Exception: failed