This reverts commit
744f7c4c314dc0e7816ac05520e8358c8318187a.
These targets do depend on the fact that each prereq is explicitly
listed via their use of $^, which I failed to notice, and broke the
build.
install-doc: install-man install-html
-install-man: man
+install-man: $(GIT_SUBTREE_DOC)
$(INSTALL) -d -m 755 $(DESTDIR)$(man1dir)
$(INSTALL) -m 644 $^ $(DESTDIR)$(man1dir)
-install-html: html
+install-html: $(GIT_SUBTREE_HTML)
$(INSTALL) -d -m 755 $(DESTDIR)$(htmldir)
$(INSTALL) -m 644 $^ $(DESTDIR)$(htmldir)
$(RM) $(GIT_SUBTREE)
$(RM) *.xml *.html *.1
-.PHONY: FORCE man html install-man install-html
+.PHONY: FORCE