Darwin, backport fixes for PR 89864 (with 90379 included)

Darwin, backport fixes for PR 89864 (with 90379 included)

2019-06-03  Iain Sandoe  <iain@sandoe.co.uk>

	Backport from mainline.
	2019-05-11  Iain Sandoe  <iain@sandoe.co.uk>

	PR bootstrap/89864
	* inclhack.def (darwin_ucred__Atomic): Do not supply test_text
	for wrap fixes.
	* fixincl.x: Regenerated.

	Backport from mainline.
	2019-04-18  Erik Schnetter  <schnetter@gmail.com>
		    Jakub Jelinek  <jakub@redhat.com>
		    Iain Sandoe  <iain@sandoe.co.uk>

	PR bootstrap/89864
	* inclhack.def (darwin_ucred__Atomic): New, work around _Atomic keyword
	use in headers included by C++.
	* fixincl.x: Regenerated.

From-SVN: r271881