opcodes/Makefile.am: $(LIBIBERTY) not set, needed for ia64-gen

[Hans-Peter Nilsson]

opcodes/Makefile.am:
ia64-gen: ia64-gen.o
        $(LINK) ia64-gen.o $(LIBIBERTY)

I can't see that LIBIBERTY is set anywhere.  Linking with libiberty
is needed and causes undefined references to xmalloc, xstrdup et
al. - unless those symbols are provided by the system libc.
Perhaps everybody doing ia64 development or --enable-targets=all
has it in their system libc and that's why nobody has noticed.

Defining LIBIBERTY as ../libiberty/libiberty.a might be right,
but perhaps there's an automake thingy that should be used.

brgds, H-P