* dwarf2read.c: Update calls to changed and renamed functions, and
references to moved variables.
(struct dwarf2_cu): Add first_fn, last_fn, cached_fn,
language, language_defn, list_in_scope, and ftypes members.
(cu_first_fn, cu_last_fn, cu_cached_fn, cu_language)
(cu_language_defn, list_in_scope, ftypes, cu_header_offset)
(baseaddr): Remove globals.
(dwarf_attr): Renamed to dwarf2_attr. Add CU argument.
(set_cu_language, die_is_declaration, die_specification)
(determine_prefix, determin_prefix_aux, class_name, namespace_name)
(dwarf2_linkage_name, dwarf2_name, dwarf2_extension)
(dwarf2_get_ref_die_offset, dwarf2_fundamental_type)
(initialize_cu_func_list, add_to_cu_func_list): Add CU argument.
(dwarf2_build_psymtabs_hard): Add local baseaddr. Initialize
cu.list_in_scope. Don't initialize cu_header_offset.
(add_partial_symbol): Add local baseaddr.
(psymtab_to_symtab_1): Add local baseaddr. Use
objfile->section_offsets for consistency. Don't initialize
cu_header_offset; do initialize cu.header.offset and
cu.list_in_scope.
(read_file_scope, read_func_scope, read_lexical_block_scope)
(dwarf_decode_lines, new_symbol): Add local baseaddr.