[PATCH] Make __wrap_iter work with gcc

[Marshall Clow]

================
Comment at: include/iterator:1116
@@ -1115,1 +1115,3 @@
+template <class _Tp, class _Alloc> class vector;
+
 template <class _Iter>
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There's also a friend decl for `basic_string` in `__wrap_iter`; why don't we need a fwd declaration for that as well?

(because it's a compiler bug?)

http://reviews.llvm.org/D7201

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