[PATCH] [ELF] Support response file.

[Rui Ueyama]

================
Comment at: lib/Driver/GnuLdDriver.cpp:104
@@ +103,3 @@
+static std::tuple<int, const char **>
+maybeExpandResponseFiles(int argc, const char **argv, BumpPtrAllocator &alloc) {
+  bool expanded = false;
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Reid Kleckner wrote:
> Any reason why cl::ExpandResponseFiles() can't be used instead of this reimplementation?
Wow, I was not just aware of it. I'll use it.


http://llvm-reviews.chandlerc.com/D3210