[MIPS] Add seccomp bpf support

sandbox/linux/seccomp-bpf/syscall_iterator.h

Index: sandbox/linux/seccomp-bpf/syscall_iterator.h
diff --git a/sandbox/linux/seccomp-bpf/syscall_iterator.h b/sandbox/linux/seccomp-bpf/syscall_iterator.h
index ea4273f76456953791ec740805b74432fd108aab..6acfff4cbd3b5396a7ac70f5fd3bc21900d30608 100644
--- a/sandbox/linux/seccomp-bpf/syscall_iterator.h
+++ b/sandbox/linux/seccomp-bpf/syscall_iterator.h
@@ -35,8 +35,11 @@ namespace sandbox {
 class SANDBOX_EXPORT SyscallIterator {
  public:
   explicit SyscallIterator(bool invalid_only)
+#if defined(__mips__) && (_MIPS_SIM == _MIPS_SIM_ABI32)
+      : invalid_only_(invalid_only), done_(false), num_(4000) {}

[jln (very slow on Chromium), 2014/05/02 20:42:04]

Is there a defined symbol instad of "4000"?

[nedeljko, 2014/05/07 15:40:05]

__NR_Linux can be used, although I need to include appropriate header file for
this.
On the other hand, I will use num_(0) here in new patch... 

+#else
       : invalid_only_(invalid_only), done_(false), num_(0) {}
-
+#endif
   bool Done() const { return done_; }
   uint32_t Next();
   static bool IsValid(uint32_t num);