libobjc:

	* encoding.c (_darwin_rs6000_special_round_type_align): New.
	(darwin_rs6000_special_round_type_align): Adjust to use new routine.

testsuite:

	* objc.dg/gnu-encoding/struct-layout-encoding-1_generate.c: Adjust XFAILs.

From-SVN: r167741