D language support.

D language support.

gdb/ChangeLog:

        D language support.
        * Makefile.in (SFILES): Add d-lang.c d-valprint.c.
        (COMMON_OBS): Add d-lang.o d-valprint.o.
        (HFILES_NO_SRCDIR): Add d-lang.h.
        * NEWS: Mention D language support.
        * c-lang.c (c_emit_char, exp_descriptor_c): Make public.
        * c-lang.h (c_emit_char, exp_descriptor_c): Add declaration.
        * d-lang.c: New file.
        * d-lang.h: New file.
        * d-valprint.c: New file.
        * defs.h (enum language): Add language_d.
        * dwarf2read.c (set_cu_language): Add DW_LANG_D.
        * language.c (binop_result_type, integral_type, character_type)
        (string_type, boolean_type, structured_type): Add language_d.
        * symfile.c (init_filename_language_table): Add language_d.
        * symtab.c: Include d-lang.h.
        (symbol_init_language_specific, symbol_find_demangled_name)
        (symbol_natural_name, lookup_symbol_in_language)
        (symbol_demangled_name, symbol_matches_domain): Add language_d.

gdb/doc/ChangeLog:

        * gdb.texinfo: (Summary) Add mention about D language support.
        (Filenames): Add D suffixes.
        (D): New node.

gdb/testsuite/ChangeLog:

        * gdb.base/default.exp: Fix "set language" test.