[tsan] Fix the value of PTHREAD_MUTEX_RECURSIVE for OS X and FreeBSD

[kubamracek]

Summary

The value of the constant PTHREAD_MUTEX_RECURSIVE is not "1" on FreeBSD and OS X.

[emaste]

LGTM although perhaps an #error else case for not-linux/mac/freebsd is a good idea so that this is explicitly addressed for the next platform.

lib/tsan/rtl/tsan_interceptors.cc

 extern "C" int mallopt(int param, int value);
 #endif
 extern __sanitizer_FILE *stdout, *stderr;
+#if !SANITIZER_FREEBSD && !SANITIZER_MAC
 const int PTHREAD_MUTEX_RECURSIVE = 1;
 const int PTHREAD_MUTEX_RECURSIVE_NP = 1;
+#else
+const int PTHREAD_MUTEX_RECURSIVE = 2;
+const int PTHREAD_MUTEX_RECURSIVE_NP = 2;
+#endif
 const int EINVAL = 22;
 const int EBUSY = 16;
 const int EOWNERDEAD = 130;