patch: use $(CXX_FOR_TARGET) in LIBLINK

[Tom Tromey]

>>>>> "Adam" == Adam Megacz <megacz@cs.berkeley.edu> writes:

Adam>   rm $(target)/libjava/Makefile
Adam>   rm $(target)/libjava/config.cache

Also... you can do this and then invoke:

    make configure-target-libjava

from top level.  I think absence of libjava/Makefile is the trigger
for this working, though I tend to forget.

Tom