Add support for the clone3() syscall to prevent a warning from
checksyscalls.sh:

<stdin>:1517:2: warning: #warning syscall clone3 not implemented [-Wcpp]

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Dinh Nguyen <dinguyen@kernel.org>
Cc: Christian Brauner <christian@brauner.io>
---
Is there some reason that NIOS2 should not (does not) support clone3()?

 arch/nios2/include/uapi/asm/unistd.h |    1 +
 1 file changed, 1 insertion(+)

diff -- a/arch/nios2/include/uapi/asm/unistd.h b/arch/nios2/include/uapi/asm/unistd.h
--- a/arch/nios2/include/uapi/asm/unistd.h
+++ b/arch/nios2/include/uapi/asm/unistd.h
@@ -22,6 +22,7 @@
 #define __ARCH_WANT_STAT64
 #define __ARCH_WANT_SET_GET_RLIMIT
 #define __ARCH_WANT_TIME32_SYSCALLS
+#define __ARCH_WANT_SYS_CLONE3
 
 /* Use the standard ABI for syscalls */
 #include <asm-generic/unistd.h>