Add includes of assert


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7307 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/Support/CommandLine.h b/include/Support/CommandLine.h
index b6c0660..245d15b 100644
--- a/include/Support/CommandLine.h
+++ b/include/Support/CommandLine.h
@@ -17,6 +17,7 @@
 #include <vector>
 #include <utility>
 #include <cstdarg>
+#include <cassert>
 #include "boost/type_traits/object_traits.hpp"
 
 /// cl Namespace - This namespace contains all of the command line option