fix doxygen brief in subzero header files

src/IceELFSection.h

 //===- subzero/src/IceELFSection.h - Model of ELF sections ------*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
-/// Representation of ELF sections.
+/// \brief Representation of ELF sections.
 ///
 //===----------------------------------------------------------------------===//
 
 #ifndef SUBZERO_SRC_ICEELFSECTION_H
 #define SUBZERO_SRC_ICEELFSECTION_H
 
 #include "IceDefs.h"
 #include "IceELFStreamer.h"
 #include "IceFixups.h"
 #include "IceOperand.h"
@@ skipping 352 matching lines @@
       Rel.setSymbolAndType(Symbol->getNumber(), Fixup.kind());
       Str.writeAddrOrOffset<IsELF64>(Rel.r_offset);
       Str.writeELFWord<IsELF64>(Rel.r_info);
     }
   }
 }
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEELFSECTION_H