Allow libc++ to be built on systems without POSIX threads

If you're crazy enough to want this sort of thing, then add
-D_LIBCPP_HAS_NO_THREADS to your CXXFLAGS and
--param=additiona_features=libcpp-has-no-threads to your lit commnad line.

http://reviews.llvm.org/D3969

llvm-svn: 217271
diff --git a/libcxx/test/thread/thread.condition/thread.condition.condvarany/wait.exception.pass.cpp b/libcxx/test/thread/thread.condition/thread.condition.condvarany/wait.exception.pass.cpp
index dd4879d..522c61b 100644
--- a/libcxx/test/thread/thread.condition/thread.condition.condvarany/wait.exception.pass.cpp
+++ b/libcxx/test/thread/thread.condition/thread.condition.condvarany/wait.exception.pass.cpp
@@ -1,3 +1,14 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
+
 #include <thread>
 #include <condition_variable>
 #include <mutex>