A dynamic linker in ia64 HP-UX does not search directories
`/usr/local/lib/hpux32', `/usr/local/lib' and `/usr/local/lib/hpux64'
without RPATH and/or LD_LIBRARY_PATH.  So if a program is linked to a
library installed in them without DT_RPATH and/or LD_LIBRARY_PATH, the
dynamic linker can not find the library.

When a program is linked to a library installed in them, this change
makes Libtool set library path to DT_RPATH of the program.

Thanks,
Norihiro