Here's a revised patch that handles "info var static_const_member".

I noticed included.exp has code to check for the dwarf format so I
copied that here.
I don't know whether other formats support static const member variables or not.

No regressions on amd64-linux.

2010-06-27  Doug Evans  <dje@google.com>

        PR gdb/11702
        * NEWS: Add entry.
        * dwarf2read.c (dwarf2_add_field): If DW_AT_const_value is present,
        create a symbol for the field and record the value.
        (new_symbol): Handle DW_TAG_member.
        * gdbtypes.c (field_is_static): Remove FIXME.
        * symtab.c (search_symbols): When searching for VARIABLES_DOMAIN,
        only ignore LOC_CONST symbols that are enums.

        testsuite/
        * gdb.cp/m-static.exp: Add testcase.
        * gdb.cp/m-static.h (gnu_obj_4): Add initialized static const member.