Change from AC_LIBLTDL_CONVENIENCE to AC_LIBLTDL_INSTALLABLE to make rpm builds work on ia64
Change from AC_LIBLTDL_CONVENIENCE to AC_LIBLTDL_INSTALLABLE to make rpm builds work on ia64

MjAbuz/graphviz,jho1965us/graphviz,jho1965us/graphviz,tkelman/graphviz,MjAbuz/graphviz,BMJHayward/graphviz,tkelman/graphviz,ellson/graphviz,MjAbuz/graphviz,ellson/graphviz,ellson/graphviz,BMJHayward/graphviz,ellson/graphviz,pixelglow/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,pixelglow/graphviz,MjAbuz/graphviz,tkelman/graphviz,kbrock/graphviz,MjAbuz/graphviz,jho1965us/graphviz,BMJHayward/graphviz,kbrock/graphviz,MjAbuz/graphviz,kbrock/graphviz,kbrock/graphviz,jho1965us/graphviz,tkelman/graphviz,jho1965us/graphviz,kbrock/graphviz,MjAbuz/graphviz,BMJHayward/graphviz,jho1965us/graphviz,pixelglow/graphviz,pixelglow/graphviz,pixelglow/graphviz,kbrock/graphviz,MjAbuz/graphviz,tkelman/graphviz,tkelman/graphviz,ellson/graphviz,tkelman/graphviz,pixelglow/graphviz,MjAbuz/graphviz,BMJHayward/graphviz,pixelglow/graphviz,ellson/graphviz,pixelglow/graphviz,BMJHayward/graphviz,MjAbuz/graphviz,kbrock/graphviz,BMJHayward/graphviz,kbrock/graphviz,jho1965us/graphviz,jho1965us/graphviz,pixelglow/graphviz,BMJHayward/graphviz,tkelman/graphviz,BMJHayward/graphviz,tkelman/graphviz,jho1965us/graphviz,jho1965us/graphviz,ellson/graphviz,kbrock/graphviz,MjAbuz/graphviz,pixelglow/graphviz,pixelglow/graphviz,kbrock/graphviz,BMJHayward/graphviz,ellson/graphviz,tkelman/graphviz,kbrock/graphviz,jho1965us/graphviz,BMJHayward/graphviz,tkelman/graphviz