* buildscripts/lilypond.words.py: remove.
* buildscripts/lilypond-words.py: add new, renamed file.
Give generated targets and dirs explicitly in arguments.
* GNUmakefile.in, elisp/GNUmakefile, elisp/lilypond-init.el,
elisp/lilypond-mode.el, vim/lilypond-ftplugin.vim,
vim/lilypond-syntax.vim: update to use new lilypond-words.py.
* config.make.in: give '/usr/share/vim' explicitly as $(vimdir).
* vim/GNUmake use --words and --vim targets in lilypond-words.py