langhooks.h (struct lang_hooks): Add dwarf_name language hook.

langhooks.h (struct lang_hooks): Add dwarf_name language hook.

	* langhooks.h (struct lang_hooks): Add dwarf_name language hook.
	* langhooks.c (lhd_dwarf_name): New function.
	* langhooks-def.h (lhd_dwarf_name): Declare.
	(LANG_HOOKS_DWARF_NAME): New macro, defaults to lhd_dwarf_name.
	* dwarf2out.c (dwarf2_name): Use the dwarf_name	language hook.
	* ada/misc.c (gnat_dwarf_name): New function.
	(LANG_HOOKS_DWARF_NAME): Define to gnat_dwarf_name.

From-SVN: r113905