fix doxygen brief in subzero header files

src/IceInstX8632.cpp

 //===- subzero/src/IceInstX8632.cpp - X86-32 instruction implementation ---===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
-/// This file defines X8632 specific data related to X8632 Instructions and
-/// Instruction traits. These are declared in the IceTargetLoweringX8632Traits.h
-/// header file.
+/// \brief Defines X8632 specific data related to X8632 Instructions and
+/// Instruction traits.
 ///
-/// This file also defines X8632 operand specific methods (dump and emit.)
+/// These are declared in the IceTargetLoweringX8632Traits.h header file. This
+/// file also defines X8632 operand specific methods (dump and emit.)
 ///
 //===----------------------------------------------------------------------===//
 #include "IceInstX8632.h"
 
 #include "IceAssemblerX8632.h"
 #include "IceCfg.h"
 #include "IceCfgNode.h"
 #include "IceConditionCodesX8632.h"
 #include "IceInst.h"
 #include "IceRegistersX8632.h"
@@ skipping 298 matching lines @@
     Var->dump(Func);
   else
     Var->dump(Str);
   Str << ")";
 }
 
 } // namespace X86Internal
 } // end of namespace Ice
 
 X86INSTS_DEFINE_STATIC_DATA(TargetX8632)