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

llvm-svn: 9903
diff --git a/llvm/include/llvm/CodeGen/MachineInstrAnnot.h b/llvm/include/llvm/CodeGen/MachineInstrAnnot.h
index 98dde59..19d93ab 100644
--- a/llvm/include/llvm/CodeGen/MachineInstrAnnot.h
+++ b/llvm/include/llvm/CodeGen/MachineInstrAnnot.h
@@ -17,6 +17,8 @@
 #include "llvm/CodeGen/MachineInstr.h"
 #include "llvm/Target/TargetRegInfo.h"
 
+namespace llvm {
+
 class Value;
 class TmpInstruction;
 class CallInst;
@@ -88,5 +90,6 @@
   static CallArgsDescriptor *get(const MachineInstr* MI);
 };
 
+} // End llvm namespace
 
 #endif