[Tsan] Fix sigaction_t to match system definition on FreeBSD

[kutuzov.viktor.84]

lib/tsan/rtl/tsan_interceptors.cc

123

Please ignore this extra empty line; it will be removed before commit.

[samsonov]

LGTM

Closed by commit rL220291 (authored by vkutuzov).

lib/tsan/rtl/tsan_interceptors.cc

 
 #define errno (*__errno_location())
 
 struct sigaction_t {
   union {
     sighandler_t sa_handler;
     void (*sa_sigaction)(int sig, my_siginfo_t *siginfo, void *uctx);
   };
+#if SANITIZER_FREEBSD
+  int sa_flags;
+  __sanitizer_sigset_t sa_mask;
+#else
   __sanitizer_sigset_t sa_mask;
   int sa_flags;
   void (*sa_restorer)();
+#endif
 };
 
+
 const sighandler_t SIG_DFL = (sighandler_t)0;
 const sighandler_t SIG_IGN = (sighandler_t)1;
 const sighandler_t SIG_ERR = (sighandler_t)-1;
 const int SA_SIGINFO = 4;
 const int SIG_SETMASK = 2;
 
 namespace std {
 struct nothrow_t {};