tsan: disable deadlock detector in Go mode

Go does not use that.
https://code.google.com/p/thread-sanitizer/issues/detail?id=89

llvm-svn: 229116

compiler-rt/lib/tsan/rtl/tsan_flags.cc

@@ -62,7 +62,9 @@ void InitializeFlags(Flags *f, const char *env) {
     CommonFlags cf;
     cf.CopyFrom(*common_flags());
     cf.allow_addr2line = true;
+#ifndef SANITIZER_GO
     cf.detect_deadlocks = true;
+#endif
     cf.print_suppressions = false;
     cf.stack_trace_format = "    #%n %f %S %M";
     OverrideCommonFlags(cf);