Don't use <sstream> in Streams.h but <iosfwd> instead.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32340 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Debugger/SourceLanguage-Unknown.cpp b/lib/Debugger/SourceLanguage-Unknown.cpp
index 276ae9f..c5d912a 100644
--- a/lib/Debugger/SourceLanguage-Unknown.cpp
+++ b/lib/Debugger/SourceLanguage-Unknown.cpp
@@ -17,6 +17,7 @@
 #include "llvm/Debugger/ProgramInfo.h"
 #include "llvm/Support/Streams.h"
 #include <cassert>
+#include <ostream>
 using namespace llvm;
 
 //===----------------------------------------------------------------------===//