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

lib/Transforms/Utils/UnifyFunctionExitNodes.cpp

@@ -22,6 +22,8 @@
 #include "llvm/iPHINode.h"
 #include "llvm/Type.h"
 
+namespace llvm {
+
 static RegisterOpt<UnifyFunctionExitNodes>
 X("mergereturn", "Unify function exit nodes");
 
@@ -112,3 +114,5 @@ bool UnifyFunctionExitNodes::runOnFunction(Function &F) {
   ReturnBlock = NewRetBlock;
   return true;
 }
+
+} // End llvm namespace