Solaris: compile in path to libraries in /usr/sfw

Qt use libXrender.so and libfreetype.so.6, (placed in /usr/sfw/lib, /usr/sfw/lib/64), but does not have compile in this path in to the libraries or executables, meaning that tools like assistant does not work out of the box without LD_LIBRARY_PATH settings with default configure settings. The fix for the one installing is easy, just add an -R option to the configure script, but I think it should work out of the box.