bfd/

bfd/
	* section.c (SEC_KEEP): Update comment.
	* bfd-in2.h: Regenerate.
	* elflink.c (bfd_elf_gc_sections): Ignore SEC_EXCLUDE sections.
	* merge.c (_bfd_merge_sections): Set SEC_KEEP on excluded sections.
	* stabs.c (_bfd_discard_section_stabs): Likewise.
	(_bfd_link_section_stabs): Likewise.  Simplify abs_section check.
ld/
	* ldlang.c (lang_map): Don't say SEC_LINKER_CREATED and SEC_KEEP
	sections have been discarded.
	(lang_do_version_exports_section): Set SEC_KEEP on export section.
	* emultempl/elf32.em (before_allocation): Set SEC_KEEP on warning
	sections.