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/uname.c

@@ -156,7 +156,7 @@ int uname_main(int argc, char **argv)
 	print_element(PRINT_MACHINE, name.machine);
 	print_element(PRINT_PROCESSOR, processor);
 
-	exit(TRUE);
+	return(TRUE);
 }
 
 /* If the name element set in MASK is selected for printing in `toprint',