Revert the optimization of the placement of LTO objects as a temporary solution for PR 22751.
PR 22751 Revert this change as a temporary solution for this PR: 2017-09-02 Alan Modra <email@example.com> * ldlang.h (lang_input_statement_type): Expand comments. (LANG_FOR_EACH_INPUT_STATEMENT): Rewrite without casts. * ldlang.c (lang_for_each_input_file): Likewise. (load_symbols): Set usrdata for archives. (find_rescan_insertion): New function. (lang_process): Trim off and reinsert entries added to file chain when rescanning archives for LTO. * ldmain.c (add_archive_element): Set my_archive input_statement next pointer to last element added.
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