Move lalr1.cc internals into yy*.

Move lalr1.cc internals into yy*.
* data/lalr1.cc (semantic_stack_, location_stack_, state_stack_)
(semantic_stack_, location_stack_, pact_, pact_ninf_, defact_)
(pgoto_, defgoto_, table_, table_ninf_, check_, stos_, r1_, r2_)
(name_, rhs_, prhs_, rline_, token_number_, eof_, last_, nnts_)
(empty_, final_, terror_, errcode_, ntokens_)
(user_token_number_max_, undef_token_, n_, len_, state_, nerrs_)
(looka_, ilooka_, error_range_, nerrs_):
Rename as...
(yysemantic_stack_, yylocation_stack_, yystate_stack_)
(yysemantic_stack_, yylocation_stack_, yypact_, yypact_ninf_)
(yydefact_, yypgoto_, yydefgoto_, yytable_, yytable_ninf_)
(yycheck_, yystos_, yyr1_, yyr2_, yyname_, yyrhs_, yyprhs_)
(yyrline_, yytoken_number_, yyeof_, yylast_, yynnts_, yyempty_)
(yyfinal_, yyterror_, yyerrcode_, yyntokens_)
(yyuser_token_number_max_, yyundef_token_, yyn_, yylen_, yystate_)
(yynerrs_, yylooka_, yyilooka_, yyerror_range_, yynerrs_):
these.