aix_closure.S (ffi_closure_ASM): Adjust for Darwin64 change to return value of ffi_closure_helper_DARWIN and...

        * src/powerpc/aix_closure.S (ffi_closure_ASM): Adjust for Darwin64
        change to return value of ffi_closure_helper_DARWIN and load type
        from return type.

From-SVN: r185152