* libtoolize.in (func_require_seen_libtool): Do not remove snippet/* files 
  which are from Gnulib.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>

--- libtool-2.4.3/libtoolize.in	2014-10-27 18:20:51.000000000 +0100
+++ libtool/libtoolize.in	2014-11-02 11:53:20.000000000 +0100
@@ -1896,8 +1896,8 @@
   # ensure a clean upgrade.
   # Do not remove config.guess, config.sub or install-sh, we don't
   # install them without --install, and the project may not be using
-  # Automake.
-  all_pkgaux_files="compile depcomp missing ltmain.sh snippet/_Noreturn.h snippet/arg-nonnull.h snippet/c++defs.h snippet/warn-on-use.h"
+  # Automake.  Similarly, do not remove Gnulib files.
+  all_pkgaux_files="compile depcomp missing ltmain.sh"
   all_pkgmacro_files="argz.m4 libtool.m4 ltdl.m4 ltoptions.m4 ltsugar.m4 ltversion.in ltversion.m4 lt~obsolete.m4"
   all_pkgltdl_files="COPYING.LIB Makefile Makefile.in Makefile.inc Makefile.am README acinclude.m4 aclocal.m4 argz_.h argz.c config.h.in config-h.in configure configure.ac configure.in libltdl/lt__alloc.h libltdl/lt__dirent.h libltdl/lt__glibc.h libltdl/lt__private.h libltdl/lt__strl.h libltdl/lt_dlloader.h libltdl/lt_error.h libltdl/lt_system.h libltdl/slist.h loaders/dld_link.c loaders/dlopen.c loaders/dyld.c loaders/load_add_on.c loaders/loadlibrary.c loaders/preopen.c loaders/shl_load.c lt__alloc.c lt__dirent.c lt__strl.c lt_dlloader.c lt_error.c ltdl.c ltdl.h ltdl.mk slist.c"