Use LLVM args to handle -malign-double option

include/clang/Basic/TargetOptions.h

Index: include/clang/Basic/TargetOptions.h
diff --git a/include/clang/Basic/TargetOptions.h b/include/clang/Basic/TargetOptions.h
index 97825394202f9d3311e31ae52a5576c73ae5e1b7..e33cee3821b8a5f122ad835aab715e8cd1f8be5d 100644
--- a/include/clang/Basic/TargetOptions.h
+++ b/include/clang/Basic/TargetOptions.h
@@ -45,6 +45,12 @@ public:
   /// The list of target specific features to enable or disable -- this should
   /// be a list of strings starting with by '+' or '-'.
   std::vector<std::string> Features;
+
+  // @LOCALMOD-START
+  /// \brief A list of arguments to forward to LLVM's option processing; this
+  /// should only be used for debugging and experimental features.
+  std::vector<std::string> LLVMArgs;
+  // @LOCALMOD-END
 };
 
 }  // end namespace clang