* testsuite/libffi.call/huge_struct.c (test_large_fn): Use PRIu8,
	PRId8 instead of %hhu, %hhd.
	* testsuite/libffi.call/ffitest.h [__alpha__ && __osf__] (PRId8,
	PRIu8): Define.
	[__sgi__] (PRId8, PRIu8): Define.

From-SVN: r175032