* ada-exp.y (type_int): New function to add layer of abstraction

* ada-exp.y (type_int): New function to add layer of abstraction
around references to expression types.
(type_long): Ditto.
(type_long_long): Ditto.
(type_float): Ditto.
(type_double): Ditto.
(type_long_double): Ditto.
(type_char): Ditto.
(type_system_address): Ditto.
(simple_exp): Use type_* functions in place of builtin_*
variables.
(exp): Ditto.
(write_var_from_name): Ditto.
(write_object_renaming): Ditto.
* ada-lang.c (ada_create_fundamental_type): Remove redundant
declaration.
(build_ada_types): Remove, replacing with...
(ada_language_arch_info): New function to initialize primitive
type vector in language_arch_info.
(ada_array_length): Remove use of builtin_type_ada_int.
(value_pos_atr): Ditto.
(ada_evaluate_subexp): Ditto.
(builtin_type_ada_int, builtin_type_ada_short, builtin_type_ada_long,
builtin_type_ada_long_long, builtin_type_ada_char,
builtin_type_ada_float, builtin_type_ada_double,
builtin_type_ada_long_double, builtin_type_ada_natural,
builtin_type_ada_positive, builtin_type_ada_system_address): Remove.
(ada_builtin_types): Remove.
(ada_language_defn): Remove entries for la_builtin_type_vector and
string_char_type and use ada_language_arch_info.
(_initialize_ada_language): Do type-vector initialization along
the lines of c-lang.c.
(ada_create_fundamental_type): Break up line.
(ada_dump_symtab): Remove unused function.
(enum ada_primitive_types): Define.
* ada-lang.h (builtin_type_ada_int, builtin_type_ada_short,
builtin_type_ada_long,builtin_type_ada_long_long,builtin_type_ada_char,
builtin_type_ada_float, builtin_type_ada_double,
builtin_type_ada_long_double, builtin_type_ada_natural,
builtin_type_ada_positive, builtin_type_ada_system_address): Remove.
* ada-lex.l: Use type_* functions in place of builtin_* variables.
(processInt): Ditto.
(processReal): Ditto.
(name_lookup): Ditto.
* ada-typeprint.c (print_range): Use builtin_type_int, not
builtin_type_ada_int.