PR ld/12380

	PR ld/12380
	* ldexp.h (enum phase_enum): Comment.  Add exp_dataseg_done.
	* ldexp.c (fold_unary <DATA_SEGMENT_END>): Rearrange code.  Test
	for exp_dataseg_done rather than expld.phase == lang_final_phase_enum
	to detect when we've finished sizing sections.
	(fold_binary <DATA_SEGMENT_ALIGN>): Likewise.
	(fold_binary <DATA_SEGMENT_RELRO_END>): Likewise.  Also test
	that we are not inside an output section statement.
	* ldlang.c (lang_size_sections): Set exp_dataseg_done on exit if
	not exp_dataseg_relro_adjust or exp_dataseg_adjust.  Don't set
	lang_final_phase_enum here.
	(lang_process): Set lang_final_phase_enum here.