Minor libiberty dependency fix

[Jeffrey A Law]

Zack added an include of config.h, but forgot the dependency.

	* Makefile.in (objalloc.o): Depend on config.h

Index: Makefile.in
===================================================================
RCS file: /cvs/gcc/egcs/libiberty/Makefile.in,v
retrieving revision 1.45
diff -c -3 -p -r1.45 Makefile.in
*** Makefile.in	2000/05/24 01:46:44	1.45
--- Makefile.in	2000/05/30 21:05:39
*************** getruntime.o: config.h $(INCDIR)/libiber
*** 272,278 ****
  hex.o: $(INCDIR)/libiberty.h
  floatformat.o: $(INCDIR)/floatformat.h
  mkstemps.o: config.h
! objalloc.o: $(INCDIR)/objalloc.h
  obstack.o: config.h $(INCDIR)/obstack.h
  partition.o: config.h $(INCDIR)/partition.h
  pexecute.o: config.h $(INCDIR)/libiberty.h
--- 272,278 ----
  hex.o: $(INCDIR)/libiberty.h
  floatformat.o: $(INCDIR)/floatformat.h
  mkstemps.o: config.h
! objalloc.o: config.h $(INCDIR)/objalloc.h
  obstack.o: config.h $(INCDIR)/obstack.h
  partition.o: config.h $(INCDIR)/partition.h
  pexecute.o: config.h $(INCDIR)/libiberty.h