libgcc: Fix config.in

It was updated incorrectly in

  commit dbbfb52b
  Author:     Szabolcs Nagy <szabolcs.nagy@arm.com>
  CommitDate: 2023-12-08 11:29:06 +0000

    libgcc: aarch64: Configure check for __getauxval

so regenerate it.

libgcc/ChangeLog:

	* config.in: Regenerate.