tde_create_handbook: Improve build message #38

It's just a small cosmetic change, but admit to yourself that it's the difference:

[ 15%] Generating index.cache.bz2
[ 16%] Generating index.cache.bz2
[ 16%] Generating index.cache.bz2
[ 16%] Generating index.cache.bz2
[ 16%] Generating index.cache.bz2
[ 16%] Generating index.cache.bz2
[ 16%] Generating index.cache.bz2
[ 16%] Generating index.cache.bz2
[ 16%] Generating index.cache.bz2
[ 16%] Generating index.cache.bz2
[ 16%] Generating index.cache.bz2
[ 17%] Generating index.cache.bz2

[ 15%] Generating artsbuilder-en-handbook
[ 16%] Generating kcontrol-audiocd-en-handbook
[ 16%] Generating kcontrol-cddb-en-handbook
[ 16%] Generating juk-en-handbook
[ 16%] Generating kaboodle-en-handbook
[ 16%] Generating kaudiocreator-en-handbook
[ 16%] Generating kmix-en-handbook
[ 16%] Generating krec-en-handbook
[ 16%] Generating kscd-en-handbook
[ 16%] Generating noatun-en-handbook
[ 16%] Generating tdeioslave-audiocd-en-handbook
[ 17%] Generating tdemid-en-handbook

Nice +1