sandbox/linux: refactor bpf_dsl dependency on die.h

sandbox/linux/seccomp-bpf/errorcode.h

Index: sandbox/linux/seccomp-bpf/errorcode.h
diff --git a/sandbox/linux/seccomp-bpf/errorcode.h b/sandbox/linux/seccomp-bpf/errorcode.h
index d88777313e3ef10abe6bc5b55689f097810ffdcf..3b27aac81afc14fd0863931d4a347e9a65e39eb8 100644
--- a/sandbox/linux/seccomp-bpf/errorcode.h
+++ b/sandbox/linux/seccomp-bpf/errorcode.h
@@ -38,7 +38,10 @@ class SANDBOX_EXPORT ErrorCode {
     // tracer will be notified of a PTRACE_EVENT_SECCOMP and allowed to change
     // or skip the system call.  The lower 16 bits of err will be available to
     // the tracer via PTRACE_GETEVENTMSG.
-    ERR_TRACE   = 0x08000000,
+    ERR_TRACE = 0x08000000,
+
+    // Kill the process immediately.
+    ERR_KILL = 0x10000000,
 
     // Deny the system call with a particular "errno" value.
     // N.B.: It is also possible to return "0" here. That would normally