Put all LLVM code into the llvm namespace, as per bug 109.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9903 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Analysis/DSGraphTraits.h

@@ -21,6 +21,8 @@
 #include "Support/iterator"
 #include "Support/STLExtras.h"
 
+namespace llvm {
+
 template<typename NodeTy>
 class DSNodeIterator : public forward_iterator<const DSNode, ptrdiff_t> {
   friend class DSNode;
@@ -146,4 +148,6 @@ template <> struct GraphTraits<const DSGraph*> {
   static ChildIteratorType child_end(const NodeType *N) { return N->end(); }
 };
 
+} // End llvm namespace
+
 #endif