Make use of const-correct ParseCommandLineOptions

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150000 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/driver/cc1as_main.cpp b/tools/driver/cc1as_main.cpp
index 14ff1e0..84aeced 100644
--- a/tools/driver/cc1as_main.cpp
+++ b/tools/driver/cc1as_main.cpp
@@ -413,7 +413,7 @@
     for (unsigned i = 0; i != NumArgs; ++i)
       Args[i + 1] = Asm.LLVMArgs[i].c_str();
     Args[NumArgs + 1] = 0;
-    llvm::cl::ParseCommandLineOptions(NumArgs + 1, const_cast<char **>(Args));
+    llvm::cl::ParseCommandLineOptions(NumArgs + 1, Args);
   }
 
   // Execute the invocation, unless there were parsing errors.