* elf32-xtensa.c (xtensa_is_insntable_section): New.

	* elf32-xtensa.c (xtensa_is_insntable_section): New.
	(xtensa_is_proptable_section): New.
	(elf_xtensa_discard_info_for_section): Handle "full" .xt.prop property
	tables with 12-byte entries, as well as tables with 8-byte entries.
	Sort the relocations before examining them.
	(relax_property_section): Use xtensa_is_proptable_section and
	xtensa_is_littable_section.  Rewrite code for combining table entries
	to be more robust in case of unexpected relocations.  Do not set offset
	of unused relocations to less than zero.
	(xtensa_is_property_section): Use other functions instead of
	duplicating section name comparisons.
	(xtensa_is_littable_section): Use CONST_STRNEQ for ".gnu.linkonce.p.".
	(xtensa_get_property_predef_flags): Use xtensa_is_insntable_section.