re PR libffi/40701 (Many libffi tests fail to compile on Tru64 UNIX)

	PR libffi/40701
	* testsuite/libffi.call/ffitest.h [__alpha__ && __osf__] (PRIdLL,
	PRIuLL, PRId64, PRIu64, PRIuPTR): Define.
	* testsuite/libffi.call/cls_align_sint64.c: Add -Wno-format on
	alpha*-dec-osf*.
	* testsuite/libffi.call/cls_align_uint64.c: Likewise.
	* testsuite/libffi.call/cls_ulonglong.c: Likewise.
	* testsuite/libffi.call/return_ll1.c: Likewise.
	* testsuite/libffi.call/stret_medium2.c: Likewise.
	* testsuite/libffi.special/ffitestcxx.h (allocate_mmap): Cast
	MAP_FAILED to char *.

From-SVN: r155710