use same build path way also for prospero

prospero/lib/pfs/Makefile.in

@@ -1,7 +1,6 @@
 # 
 # Makefile for Prospero Directory Service PFS library. 
-SOURCEBASE = ../..
-include $(SOURCEBASE)/Makefile.config
+include $(PROSPERO_ROOT)/Makefile.config
 
 CFILES = \
 	acalloc.c \
@@ -248,7 +247,7 @@ ${PFS_LIB}: ${OBJECTS}
 	$(RANLIB) ${PFS_LIB}
 
 ## This will cuse there to be too many dependencies for TAGS and ETAGS
-## include $(SOURCEBASE)/Makefile.boilerplate
+## include $(PROSPERO_ROOT)/Makefile.boilerplate
 
 # Dependencies
 acalloc.o : ../../include/pmachine.h \