Bug#695066: Empty packages created when rebuilt (because of cernlib change)

[Jason Conti]

Package: geant321
Version: 3.21.14.dfsg-9

The change in cernlib 20061220+dfsg3-2:
* debian/debhelper: rename to debian/dh to make lintian happy.

seems to be resulting in empty packages when geant321 is rebuilt. Not
immediately a
problem in unstable, but in Ubuntu since 11.10 this has resulted in
empty packages
(see https://bugs.launchpad.net/ubuntu/+source/geant321/+bug/1085573 ).

The fix is just to rename the debian/debhelper directory to debian/dh.
I opted not to
include a debdiff because it is a bit ugly with all the renaming, but
would be happy to
provide one if desired.