GUB missing Changelog and RELEASE-COMMIT

[Graham Percival]

There were some FIXME remarks about darwin-ppc's libgcc, but I
think I can ignore them.  A few mingw strip commands had "command
barfed", such as libguile-srfi-srfi-60-v-2.l and
lilypond-windows.bat.in, but again I assume that I can ignore
those errors too.

This appears to be the thing that stops GUB, which is odd because
it worked on 2009-06-08, and the changes since then don't look as
though they would have changed this.

----
ln: accessing
`/home/lilypond/gub/target/linux-x86/src/lilypond-git.sv.gnu.org--lilypond.git-master/ChangeLog':
No such file or directory
ln: accessing
`/home/lilypond/gub/target/linux-x86/src/lilypond-git.sv.gnu.org--lilypond.git-master/RELEASE-COMMIT':
No such file or directory
make[5]: *** [local-dist] Error 1
make[5]: Leaving directory
`/home/lilypond/gub/target/linux-x86/build/lilypond-git.sv.gnu.org--lilypond.git-master'
make[4]: *** [dist] Error 2
make[4]: Leaving directory
`/home/lilypond/gub/target/linux-x86/build/lilypond-git.sv.gnu.org--lilypond.git-master'
cd
/home/lilypond/gub/target/linux-x86/build/lilypond-git.sv.gnu.org--lilypond.git-master/
&& make DOCUMENTATION=yes dist
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
make[3]: *** [unlocked-dist-check] Error 1
-----