fix doxygen brief in subzero header files

src/IceBrowserCompileServer.h

 //===- subzero/src/IceBrowserCompileServer.h - Browser server ---*- 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 browser-specific compile server.
+/// \brief Declares the browser-based compile server.
 ///
 //===----------------------------------------------------------------------===//
 
 #ifndef SUBZERO_SRC_ICEBROWSERCOMPILESERVER_H
 #define SUBZERO_SRC_ICEBROWSERCOMPILESERVER_H
 
 #include "IceClFlags.h"
 #include "IceClFlagsExtra.h"
 #include "IceCompileServer.h"
 #include "IceDefs.h"
@@ skipping 84 matching lines @@
   std::unique_ptr<ELFStreamer> ELFStream;
   ClFlags Flags;
   ClFlagsExtra ExtraFlags;
   std::thread CompileThread;
   std::atomic<bool> HadError;
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEBROWSERCOMPILESERVER_H