Make -save-temps behave like in GCC 4.5.

The -save-temps option now behaves like described in GCC 4.5 release notes
(you can specify output directory for temporary files with -save-temps=obj
-o $DIRNAME). I do not have GCC 4.5 installed, so if there are any
inconsistencies between llvmc and GCC in the implementation of this
feature, please let me know.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74190 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CompilerDriver/Action.cpp

@@ -12,8 +12,8 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/CompilerDriver/Action.h"
+#include "llvm/CompilerDriver/BuiltinOptions.h"
 
-#include "llvm/Support/CommandLine.h"
 #include "llvm/System/Program.h"
 
 #include <iostream>
@@ -22,9 +22,6 @@
 using namespace llvm;
 using namespace llvmc;
 
-extern cl::opt<bool> DryRun;
-extern cl::opt<bool> VerboseMode;
-
 namespace {
   int ExecuteProgram(const std::string& name,
                      const StrVector& args) {