Attaching lineno to buckets is stupid, since only one copy of each

symbol is kept, only the line of the first occurrence is kept too.
* src/symtab.h, src/symtab.c (bucket): Remove the line member.
* src/reader.c (rline_allocated): Remove, unused.
(symbol_list): Have a `line' member.
(symbol_list_new): New.
(readgram): Use it.
* src/print.c (print_grammar): Output the rule line numbers.
* tests/regression.at (Solved SR Conflicts)
(Unresolved SR Conflicts): Adjust.
Reported by Hans Aberg.

src/symtab.c

@@ -49,9 +49,6 @@ hash (const char *key)
 static bucket *
 bucket_new (const char *tag, int hashval)
 {
-  /* Hack, until we have a Bison parser. */
-  extern int lineno;
-
   bucket *res = XMALLOC (bucket, 1);
 
   res->link = symtab[hashval];
@@ -64,7 +61,6 @@ bucket_new (const char *tag, int hashval)
   res->user_token_number = SUNDEF;
   res->alias = NULL;
   res->class = unknown_sym;
-  res->line = lineno;
 
   nsyms++;