Group conditions after `&&`

If the conditions are not grouped we can reach
this block even if `__NR_stat` is not defined.

`defined __NR_stat && ((!defined(__UCLIBC_USE_TIME64__) || defined(__sparc__))`
gives us false but `LINUX_VERSION_CODE <= KERNEL_VERSION(5,1,0))`
may give us true. So if linux headers version is below 5.1.0 and
__NR_stat is not defined we can have compilation error

Signed-off-by: Dmitry Chestnykh <dm.chestnykh@gmail.com>

ldso/include/dl-syscall.h

@@ -141,7 +141,7 @@ static __always_inline int _dl_stat(const char *file_name,
 {
 	return _dl_newfstatat(AT_FDCWD, file_name, buf, 0);
 }
-#elif defined __NR_stat && (!defined(__UCLIBC_USE_TIME64__) || defined(__sparc__)) || (LINUX_VERSION_CODE <= KERNEL_VERSION(5,1,0))
+#elif defined __NR_stat && (!defined(__UCLIBC_USE_TIME64__) || defined(__sparc__) || (LINUX_VERSION_CODE <= KERNEL_VERSION(5,1,0)))
 # define __NR__dl_stat __NR_stat
 static __always_inline _syscall2(int, _dl_stat, const char *, file_name,
                         struct stat *, buf)