Fix #1268 Installation of softlinks into non-owned directories is done as a separate step, with soft failures, so that a developer can do:    ./configure --prefix=$HOME/graphviz; make; make install without root priviledges.
Fix #1268
Installation of softlinks into non-owned directories is done as a
separate step, with soft failures, so that a developer can do:
   ./configure --prefix=$HOME/graphviz; make; make install
without root priviledges.

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