feat: 支持setns接口

BREAKING CHANGE:
支持setns接口对外变更:
1.新增setns接口

Close #I6D9Y0

Signed-off-by: zhushengle <zhushengle@huawei.com>
Change-Id: I9aacf9e5b8463e8e6c743a0041a5b2b18fdb0e12

syscall/process_syscall.c

@@ -378,6 +378,15 @@ int SysUnshare(int flags)
 #endif
 }
 
+int SysSetns(int fd, int type)
+{
+#ifdef LOSCFG_KERNEL_CONTAINER
+    return OsSetNs(fd, type);
+#else
+    return -ENOSYS;
+#endif
+}
+
 unsigned int SysGetPPID(void)
 {
 #ifdef LOSCFG_PID_CONTAINER