fix doxygen brief in subzero header files

src/IceInstARM32.h

 //===- subzero/src/IceInstARM32.h - ARM32 machine instructions --*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
-/// This file declares the InstARM32 and OperandARM32 classes and their
-/// subclasses. This represents the machine instructions and operands used for
-/// ARM32 code selection.
+/// \brief Declares the InstARM32 and OperandARM32 classes and their subclasses.
+///
+/// This represents the machine instructions and operands used for ARM32 code
+/// selection.
 ///
 //===----------------------------------------------------------------------===//
 
 #ifndef SUBZERO_SRC_ICEINSTARM32_H
 #define SUBZERO_SRC_ICEINSTARM32_H
 
 #include "IceConditionCodesARM32.h"
 #include "IceDefs.h"
 #include "IceInst.h"
 #include "IceInstARM32.def"
@@ skipping 1295 matching lines @@
 // default implementations. Without this, there is the possibility of ODR
 // violations and link errors.
 
 template <> void InstARM32Ldr::emit(const Cfg *Func) const;
 template <> void InstARM32Movw::emit(const Cfg *Func) const;
 template <> void InstARM32Movt::emit(const Cfg *Func) const;
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEINSTARM32_H