Fix more -Wcast-qual warnings.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101656 91177308-0d34-0410-b5e6-96231b3b80d8

tools/lto/LTOCodeGenerator.cpp

@@ -370,7 +370,7 @@ bool LTOCodeGenerator::generateAssemblyCode(formatted_raw_ostream& out,
     // if options were requested, set them
     if ( !_codegenOptions.empty() )
         cl::ParseCommandLineOptions(_codegenOptions.size(), 
-                                                (char**)&_codegenOptions[0]);
+                                    const_cast<char **>(&_codegenOptions[0]));
 
     // Instantiate the pass manager to organize the passes.
     PassManager passes;