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

llvm-svn: 9903
diff --git a/llvm/utils/TableGen/CodeEmitterGen.h b/llvm/utils/TableGen/CodeEmitterGen.h
index d7b4bc1..19ca545 100644
--- a/llvm/utils/TableGen/CodeEmitterGen.h
+++ b/llvm/utils/TableGen/CodeEmitterGen.h
@@ -16,6 +16,8 @@
 
 #include "TableGenBackend.h"
 
+namespace llvm {
+
 class CodeEmitterGen : public TableGenBackend {
   RecordKeeper &Records;
 public:
@@ -28,4 +30,6 @@
   void emitGetValueBit(std::ostream &o, const std::string &Namespace);
 };
 
+} // End llvm namespace
+
 #endif