[PATCH] LibDriver, llvm-lib: introduce.

[Eric Christopher]

>
>
> +namespace {
> +class StrDupSaver : public cl::StringSaver {
> +  std::vector<char *> Dups;
> ----------------
> We really should just move the string saver that rui implemented to llvm
> and make it the one true string saver.
> At least add a fixme about that.
>
>
Given we do it all over clang as well it'd be nice, yes.

-eric
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