[patch] libffi, fix powerpc-unknown-freebsd

[David Edelsohn]

	* src/powerpc/ffitarget.h (ffi_abi): Add FFI_LINUX and
	FFI_LINUX_SOFT_FLOAT to the POWERPC_FREEBSD enum.
	Adjust copyright notice.
	* src/powerpc/ffi.c (ffi_prep_cif_machdep): Fix bit position
	calculation for FFI_SYSV_TYPE_SMALL_STRUCT.
	(ffi_closure_helper_SYSV): Fix return type for
	FFI_SYSV_TYPE_SMALL_STRUCT.
	Adjust copyright notice.

Okay.

Please add more documentation for FFI_SYSV_TYPE_SMALL_STRUCT -- what
it represents and that it uses two bits.

Thanks, David