[PATCH] [Tsan] Fix the signal_recursive.cc test to build on FreeBSD

[Viktor Kutuzov]

================
Comment at: test/tsan/signal_recursive.cc:14-18
@@ -13,3 +13,7 @@
 
+#if defined(__FreeBSD__)
+static const int kSigSuspend = SIGINFO;
+#else
 static const int kSigSuspend = SIGPWR;
+#endif
 static const int kSigRestart = SIGXCPU;
----------------
emaste wrote:
> Is the specific signal of interest here, or do we just need two arbitrary signals? If the latter, can we just use `SIGUSR1` instead?
To me they look like two arbitrary "informative" signals that do not need any special handling. From this point of view, SIGINFO may be somewhat more expressive than SIGUSR1, but I'm not sure.

Dmitry, can you please let us know if SIGPWR and SIGXCPU have been chosen for a reason?

http://reviews.llvm.org/D5841