Have more complete shift traces.

* data/yacc.c, data/lalr1.c, data/glr.c: Use YY_SYMBOL_PRINT
to report Shifts instead of ad hoc YYDPRINTF invocations,
including for the error token.
* data/lalr1.cc (symprint_): Output the location.
* tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): In C++, don't
output the location within the %printer.
Activate GLR tests, at least to make sure they compile properly.
They still don't pass though.
* tests/calc.at: Adjust expect verbose output, since now "Entering
state..." is on a different line than the "Shifting" message.

data/lalr1.cc

@@ -400,7 +400,8 @@ yy::]b4_parser_class_name[::symprint_ (int yytype,
   (void) yylocationp;
 
   cdebug_ << (yytype < ntokens_ ? "token" : "nterm")
-	  << ' ' << name_[yytype] << " (";
+	  << ' ' << name_[yytype] << " ("
+          << *yylocationp << ": ";
   switch (yytype)
     {
 ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl
@@ -419,8 +420,6 @@ yy::]b4_parser_class_name[::destruct_ (const char *yymsg,
   (void) yyvaluep;
   (void) yylocationp;
 
-  if (!yymsg)
-    yymsg = "Deleting";
   YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp);
 
   switch (yytype)
@@ -520,10 +519,7 @@ yybackup:
     goto yyacceptlab;
 
   /* Shift the look-ahead token.  */
-#if YYDEBUG
-  YYCDEBUG << "Shifting token " << looka_
-           << " (" << name_[ilooka_] << "), ";
-#endif
+  YY_SYMBOL_PRINT ("Shifting", ilooka_, &value, &location);
 
   /* Discard the token being shifted unless it is eof.  */
   if (looka_ != eof_)
@@ -697,8 +693,6 @@ yyerrlab1:
   if (n_ == final_)
     goto yyacceptlab;
 
-  YYCDEBUG << "Shifting error token, ";
-
   {
     Location errloc;
     errloc.begin = error_start_;
@@ -707,6 +701,10 @@ yyerrlab1:
     location_stack_.push (errloc);
   }
 
+  /* Shift the error token. */
+  YY_SYMBOL_PRINT ("Shifting", stos_[n_],
+		   &semantic_stack_[0], &location_stack_[0]);
+
   state_ = n_;
   goto yynewstate;