Fixed archive action. Previously archives were always removed and recreated with

only the recompiled object files which resulted in archives containing only the
object files for the modified sources.


[SVN r28322]

v1/tru64cxx65-tools.jam

@@ -129,6 +129,5 @@ rule Archive-action
 
 actions updated together piecemeal tru64cxx65-Archive-action
 {
-  rm -f $(<)
-  ar r$(ARFLAGS) $(<) $(>)
+  ar -ru$(ARFLAGS) $(<) $(>)
 }