gold/

gold/
	* layout.cc (gdb_sections): Remove ".debug_" prefixes,
	add .debug_macro.
	(lines_only_debug_sections): Likewise.
	(gdb_fast_lookup_sections): New static array.
	(is_gdb_debug_section): Rename formal parameter.
	(is_lines_only_debug_section): Likewise.
	(is_gdb_fast_lookup_section): New function.
	(Layout::include_section): Check for ".zdebug_" prefix; pass
	section name suffix to is_gdb_debug_section, et al.; check for
	fast-lookup sections when building .gdb_index.
	* options.h (--strip-debug-gdb): Update GDB version number.