[PATCH] Support building tsan_test_util_linux.cc on FreeBSD

[Alexey Samsonov]

LGTM

================
Comment at: lib/tsan/tests/rtl/tsan_test_util_linux.cc:273
@@ -267,3 +272,3 @@
     tsan_mop(ev->ptr);
-    CHECK_EQ(errno, ECHRNG);  // In no case must errno be changed.
+    CHECK_EQ(errno, ErrCode);  // In no case must errno be changed.
     break;
----------------
While you're here, replace this with
  CHECK_EQ(ErrCode, errno);
(expected value is supposed to go first).

http://reviews.llvm.org/D5210