acinclude.m4 (GLIBCPP_CHECK_SETRLIMIT_ancilliary): Reorder and include all required headers for test against older POSIX standard.

	* acinclude.m4 (GLIBCPP_CHECK_SETRLIMIT_ancilliary): Reorder and
	include all required headers for test against older POSIX standard.
	(GLIBCPP_CHECK_SETRLIMIT): Likewise.
	(ac_setrlimit): Likewise.
	* aclocal.m4: Regenerate.
	* configure: Regenerate.
	* testsuite/testsuite_hooks.cc: Reorder and include all
	required headers for use against older POSIX standard.

From-SVN: r54452