Updates to a number of apps to remove warnings/compile errors under libc5.

Tested under both libc5 and libc6 and all seems well with these fixes.
 -Erik

coreutils/ln.c

@@ -136,7 +136,7 @@ extern int ln_main(int argc, char **argv)
 			exit FALSE;
 		}
 	}
-	exit TRUE;
+	return( TRUE);
 }
 
 /*