sync with gnulib

* gl/lib/regcomp.c.diff: Update to apply to changed version in gnulib.
* gnulib: Update submodule to latest.

gl/lib/regcomp.c.diff

@@ -1,17 +1,8 @@
-diff --git c/lib/regcomp.c i/lib/regcomp.c
-index 6472ff6..665b2ab 100644
---- c/lib/regcomp.c
-+++ i/lib/regcomp.c
-@@ -18,6 +18,8 @@
-    with this program; if not, write to the Free Software Foundation,
-    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
-
-+#include "intprops.h"
-+#include "verify.h"
- static reg_errcode_t re_compile_internal (regex_t *preg, const char * pattern,
- 					  size_t length, reg_syntax_t syntax);
- static void re_compile_fastmap_iter (regex_t *bufp,
-@@ -541,7 +543,7 @@ regerror (errcode, preg, errbuf, errbuf_size)
+diff --git a/lib/regcomp.c b/lib/regcomp.c
+index d5968bd..4926676 100644
+--- a/lib/regcomp.c
++++ b/lib/regcomp.c
+@@ -541,7 +541,7 @@ regerror (errcode, preg, errbuf, errbuf_size)
      size_t errbuf_size;
  #else /* size_t might promote */
  size_t
@@ -20,7 +11,7 @@ index 6472ff6..665b2ab 100644
  	  char *_Restrict_ errbuf, size_t errbuf_size)
  #endif
  {
-@@ -1375,7 +1377,7 @@ calc_first (void *extra, bin_tree_t *node)
+@@ -1383,7 +1383,7 @@ calc_first (void *extra, bin_tree_t *node)
 
  /* Pass 2: compute NEXT on the tree.  Preorder visit.  */
  static reg_errcode_t
@@ -29,17 +20,7 @@ index 6472ff6..665b2ab 100644
  {
    switch (node->token.type)
      {
-@@ -2571,7 +2573,8 @@ parse_dup_op (bin_tree_t *elem, re_string_t *regexp, re_dfa_t *dfa,
-   /* This loop is actually executed only when end != REG_MISSING,
-      to rewrite <re>{0,n} as (<re>(<re>...<re>?)?)?...  We have
-      already created the start+1-th copy.  */
--  if ((Idx) -1 < 0 || end != REG_MISSING)
-+  verify (! TYPE_SIGNED (Idx));
-+  if (end != REG_MISSING)
-     for (i = start + 2; i <= end; ++i)
-       {
- 	elem = duplicate_tree (elem, dfa);
-@@ -2731,7 +2734,8 @@ static reg_errcode_t
+@@ -2744,7 +2744,8 @@ static reg_errcode_t
  internal_function
  build_collating_symbol (bitset_t sbcset,
  # ifdef RE_ENABLE_I18N
@@ -49,7 +30,7 @@ index 6472ff6..665b2ab 100644
  # endif
  			const unsigned char *name)
  {
-@@ -3309,7 +3313,8 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
+@@ -3323,7 +3324,8 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
 
  static reg_errcode_t
  parse_bracket_element (bracket_elem_t *elem, re_string_t *regexp,
@@ -59,7 +40,7 @@ index 6472ff6..665b2ab 100644
  		       reg_syntax_t syntax, bool accept_hyphen)
  {
  #ifdef RE_ENABLE_I18N
-@@ -3396,8 +3401,9 @@ parse_bracket_symbol (bracket_elem_t *elem, re_string_t *regexp,
+@@ -3410,8 +3412,9 @@ parse_bracket_symbol (bracket_elem_t *elem, re_string_t *regexp,
 
  static reg_errcode_t
  #ifdef RE_ENABLE_I18N
@@ -71,7 +52,7 @@ index 6472ff6..665b2ab 100644
  #else /* not RE_ENABLE_I18N */
  build_equiv_class (bitset_t sbcset, const unsigned char *name)
  #endif /* not RE_ENABLE_I18N */
-@@ -3798,7 +3804,7 @@ free_token (re_token_t *node)
+@@ -3816,7 +3819,7 @@ free_token (re_token_t *node)
     and its children. */
 
  static reg_errcode_t