* obj-c++.dg/try-catch-2.mm: Move dg-options after dg-xfail-if.
	* obj-c++.dg/encode-8.mm: Move dg-options after dg-do.
	* obj-c++.dg/bitfield-4.mm: Ditto; use dg-prune-output instead of
	dg-excess-errors for possible additional message.
	* obj-c++.dg/layout-1.mm: Use dg-prune-output instead of
	dg-excess-errors for possible additional message.

From-SVN: r135686