bfd/

bfd/
	* elflink.c (elf_section_ignore_discarded_relocs): Revert last
	change.  Comment.
	(elf_section_complain_discarded): New function.  Handle
	.gcc_except_table too.
	(elf_link_input_bfd): Rewrite handling of relocs against symbols
	in discarded sections.
	* elf-bfd.h (elf_discarded_section): Protect macro arg.
ld/testsuite/
	* ld-discard/extern.d: Update.
	* ld-discard/start.d: Update.
	* ld-discard/static.d: Update.