[opendx-dev] fix to /html/Makefile.am

[Jari Vuoksenranta <javu@phys.jyu.fi>]

"
install-data-local:
	sh -c 'f=`pwd` ; \
	       if test ! -d $(htmldir) ; then \
		   mkdir $(htmldir) ; \
	       fi ; \
	       chmod 755 $(htmldir); \
	       cd $(htmldir) ; \
	       tar xpoNf $$f/pages.tar ; \
	       tar xpoNf $$f/images.tar ; \
	       ln -s $(htmldir)/allguide.htm $(htmldir)/index.htm ; \
	       ln -s $(htmldir)/allguide.htm $(htmldir)/index.html ; \
	       cd $$f ; \
	      '
"

irix6.5's tar also complains: "tape blocksize error" when
untaring "pages.tar" and "images.tar".