Avoid redefined warning of "SIGSTKSZ"
Avoid redefined warning of "SIGSTKSZ"

ucontext-cp.c:24:0: warning: "SIGSTKSZ" redefined
 #define SIGSTKSZ 8192

In file included from /usr/include/signal.h:316:0,
                 from ucontext-cp.c:13:
/usr/include/aarch64-linux-gnu/bits/sigstack.h:30:0: note: this is the location of the previous definition
 #define SIGSTKSZ 16384

Signed-off-by: Jackie Liu <3a40a5e978aa430e3650595124e8aff18e1d8396@kylinos.cn>
Signed-off-by: Jens Axboe <cd8c6775e60d6f67a6984377324e5290df3d5358@kernel.dk>

axboe/liburing,axboe/liburing,axboe/liburing