Doxygenize the documentation comments

src/IceTranslator.cpp

 //===- subzero/src/IceTranslator.cpp - ICE to machine code ------*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
-//
-// This file defines the general driver class for translating ICE to
-// machine code.
-//
+///
+/// \file
+/// This file defines the general driver class for translating ICE to
+/// machine code.
+///
 //===----------------------------------------------------------------------===//
 
 #include "IceTranslator.h"
 
 #include "IceCfg.h"
 #include "IceClFlags.h"
 #include "IceDefs.h"
 #include "IceGlobalInits.h"
 #include "IceTargetLowering.h"
 
@@ skipping 34 matching lines @@
 void Translator::translateFcn(std::unique_ptr<Cfg> Func) {
   Ctx->optQueueBlockingPush(std::move(Func));
 }
 
 void Translator::lowerGlobals(
     std::unique_ptr<VariableDeclarationList> VariableDeclarations) {
   EmitterWorkItem *Item = new EmitterWorkItem(getNextSequenceNumber(),
                                               VariableDeclarations.release());
   Ctx->emitQueueBlockingPush(Item);
 }