* data/glr.c (yyreturn): Use "Cleanup:" rather than "Error:"

in yydestruct diagnostic, since it might not be an error.
Problem reported by Joel Denny near end of
<http://lists.gnu.org/archive/html/help-bison/2005-07/msg00040.html>.
* data/lalr1cc (yyerturn): Likewise.
* data/yacc.c (yyreturn): Likewise.
* tests/calc.at (_AT_CHECK_CALC_ERROR): Adjust to the above change.

tests/calc.at

@@ -405,6 +405,7 @@ sed '/^Starting/d
 /^Reducing/d
 /^Shifting/d
 /^state/d
+/^Cleanup:/d
 /^Error:/d
 /^Next/d
 /^Discarding/d