fts.c: add a comment about wrong usage of _lfs_64.h

This file needs anyway some massage (style update), I'll leave the fix
to the committer.

Signed-off-by: Peter S. Mazinger <ps.m@gmx.net>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libc/misc/fts/fts.c

@@ -38,6 +38,7 @@
 #include <unistd.h>
 
 #ifdef __UCLIBC_HAS_LFS__
+/* this is wrong, either you include this header as first, or not at all */
 # include <_lfs_64.h>
 #else
 # define stat64 stat