[Committed] xfail objc.dg-struct-layout-encoding-1/t0xx where xx >=25

[Andrew Pinski <pinskia at physics dot uc dot edu>]

The FIXME in the source for the generator describes why these are 
xfailed:
+  /* FIXME: these should not be xfailed but they are because
+     of bugs in libobjc and the objc front-end.  25 is because
+     vectors are not encoded.  The rest are because or zero sized
+     arrays are encoded as pointers.  */

Both of those bugs have been filed already, the later one is harder to 
fix
as it means also figuring out why some other tests fail when it to the 
"right"
encoding. I don't have time to fix that and both of these issues are not
regressions and in fact nobody would notice these until I created this 
automatic
generator.

Committed after a quick test on powerpc-darwin to make sure that they 
are xfailed.

Thanks,
Andrew Pinski

ChangeLog:

	* objc.dg/gnu-encoding/struct-layout-encoding-1_generate.c 
(switchfiles):
	xfail txxx where xxx >= 25.

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