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

llvm-svn: 9903
diff --git a/llvm/lib/CodeGen/RegAlloc/LiveRangeInfo.h b/llvm/lib/CodeGen/RegAlloc/LiveRangeInfo.h
index 5c5244b..a8d0e71 100644
--- a/llvm/lib/CodeGen/RegAlloc/LiveRangeInfo.h
+++ b/llvm/lib/CodeGen/RegAlloc/LiveRangeInfo.h
@@ -29,6 +29,8 @@
 #include "llvm/CodeGen/ValueSet.h"
 #include "Support/hash_map"
 
+namespace llvm {
+
 class LiveRange;
 class MachineInstr;
 class RegClass;
@@ -121,4 +123,6 @@
   void printLiveRanges();
 };
 
+} // End llvm namespace
+
 #endif