virtiofsd: Seccomp: Add 'send' for syslog

On ppc, and some other archs, it looks like syslog ends up using 'send'
rather than 'sendto'.

Reference: https://github.com/kata-containers/kata-containers/issues/1050



Reported-by:  <amulmek1@in.ibm.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20201102150750.34565-1-dgilbert@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

tools/virtiofsd/passthrough_seccomp.c

@@ -118,6 +118,7 @@ static const int syscall_whitelist[] = {
 
 /* Syscalls used when --syslog is enabled */
 static const int syscall_whitelist_syslog[] = {
+    SCMP_SYS(send),
     SCMP_SYS(sendto),
 };