fix doxygen brief in subzero header files

src/IceCompiler.cpp

 //===- subzero/src/IceCompiler.cpp - Driver for bitcode translation -------===//
 //
 //                        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 a driver for translating PNaCl bitcode into native code.
-/// It can either directly parse the binary bitcode file, or use LLVM routines
-/// to parse a textual bitcode file into LLVM IR and then convert LLVM IR into
-/// ICE. In either case, the high-level ICE is then compiled down to native
-/// code, as either an ELF object file or a textual asm file.
+/// \brief Defines a driver for translating PNaCl bitcode into native code.
+///
+/// The driver can either directly parse the binary bitcode file, or use LLVM
+/// routines to parse a textual bitcode file into LLVM IR and then convert LLVM
+/// IR into ICE. In either case, the high-level ICE is then compiled down to
+/// native code, as either an ELF object file or a textual asm file.
 ///
 //===----------------------------------------------------------------------===//
 
 #include "IceCompiler.h"
 
 #include "IceCfg.h"
 #include "IceClFlags.h"
 #include "IceClFlagsExtra.h"
 #include "IceConverter.h"
 #include "IceELFObjectWriter.h"
@@ skipping 156 matching lines @@
 
   if (Ctx.getFlags().getTimeEachFunction()) {
     constexpr bool DumpCumulative = false;
     Ctx.dumpTimers(GlobalContext::TSK_Funcs, DumpCumulative);
   }
   constexpr bool FinalStats = true;
   Ctx.dumpStats("_FINAL_", FinalStats);
 }
 
 } // end of namespace Ice