Convert comments to proper Doxygen comments.

llvm-svn: 158248
diff --git a/llvm/lib/Object/Archive.cpp b/llvm/lib/Object/Archive.cpp
index 71d5a64..2a5951a 100644
--- a/llvm/lib/Object/Archive.cpp
+++ b/llvm/lib/Object/Archive.cpp
@@ -28,7 +28,7 @@
   char UID[6];
   char GID[6];
   char AccessMode[8];
-  char Size[10]; //< Size of data, not including header or padding.
+  char Size[10]; ///< Size of data, not including header or padding.
   char Terminator[2];
 
   ///! Get the name without looking up long names.