* testsuite/libffi.call/float1.c (value_type): New typedef.
	(CANARY): New define.
	(main): Check for result buffer overflow.
	* src/powerpc/linux64.S: Handle linux64 long double returns.
	* src/powerpc/ffi.c (FLAG_RETURNS_128BITS): New constant.
	(ffi_prep_cif_machdep): Handle linux64 long double returns.

From-SVN: r104660