fix doxygen brief in subzero header files

src/IceGlobalInits.h

 //===- subzero/src/IceGlobalInits.h - Global declarations -------*- 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 representation of function declarations, global
-/// variable declarations, and the corresponding variable initializers in
-/// Subzero. Global variable initializers are represented as a sequence of
-/// simple initializers.
+/// \brief Declares the representation of function declarations, global variable
+/// declarations, and the corresponding variable initializers in Subzero.
+///
+/// Global variable initializers are represented as a sequence of simple
+/// initializers.
 ///
 //===----------------------------------------------------------------------===//
 
 #ifndef SUBZERO_SRC_ICEGLOBALINITS_H
 #define SUBZERO_SRC_ICEGLOBALINITS_H
 
 #include "IceDefs.h"
 #include "IceGlobalContext.h"
 #include "IceTypes.h"
 
@@ skipping 369 matching lines @@
 template <class StreamType>
 inline StreamType &operator<<(StreamType &Stream,
                               const GlobalDeclaration &Addr) {
   Addr.dump(Stream);
   return Stream;
 }
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEGLOBALINITS_H