libjava build is broken on SMP

[Andrew Haley]

H. J. Lu writes:
 > With this patch:
 > 
 > http://gcc.gnu.org/ml/java-patches/2003-q3/msg00427.html
 > 
 > libjava is broken on SMP. I got
 > 
 > make: *** No rule to make target `java/lang/AbstractMethodError.class', needed by `java/lang/AbstractMethodError.h'.  Stop.
 > 
 > Could you please fix it?
 > 
 > BTW, I am running make 3.80.

Mohan, FYI: you don't need an SMP box to test this.  'make -j10' or
somesuch will work even on a uniprocessor.

Andrew.