Enable the response file ('llvmc @file') support.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51731 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvmc2/llvmc.cpp b/tools/llvmc2/llvmc.cpp
index a749274..c06ea59 100644
--- a/tools/llvmc2/llvmc.cpp
+++ b/tools/llvmc2/llvmc.cpp
@@ -71,8 +71,8 @@
   try {
     CompilationGraph graph;
 
-    cl::ParseCommandLineOptions(argc, argv,
-                                "LLVM Compiler Driver (Work In Progress)");
+    cl::ParseCommandLineOptions
+      (argc, argv, "LLVM Compiler Driver (Work In Progress)", true);
     PopulateCompilationGraph(graph);
 
     if (WriteGraph) {