openposix: Fix the dummy declaration for lio_listio

The second parameter should be "struct aiocb *const [restrict]" instead
of "struct aiocb *restrict const [restrict]" based on the header file "aio.h".

For "struct aiocb *restrict const [restrict]", it will report "-Wincompatible-pointer-types"
issue while compiling:
- With gcc 11.5.0, it's a warning issue.
- With gcc 14.2.0, it becomes an error.

Link: https://lore.kernel.org/ltp/[email protected]/
Reviewed-by: Petr Vorel <[email protected]>
Signed-off-by: Ma Xinjian <[email protected]>

testcases/open_posix_testsuite/conformance/definitions/aio_h/4-1.c

@@ -16,7 +16,7 @@ static ssize_t (*dummy4) (struct aiocb*) = aio_return;
 static int (*dummy5) (const struct aiocb* const[], int,
 	       const struct timespec *) = aio_suspend;
 static int (*dummy6) (struct aiocb *) = aio_write;
-static int (*dummy7) (int, struct aiocb *restrict const [restrict],
+static int (*dummy7) (int, struct aiocb *const [restrict],
 	       int, struct sigevent *restrict) = lio_listio;
 
 int main(void)