XFAIL: libcpp-no-deduction-guides in libcxx/test/std/strings/basic.string/string.cons/iter_alloc_deduction.fail.cpp

Summary: Refactor the previous version method of marking each apple-clang version as UNSUPPORTED and just XFAIL'ing the libcpp-no-deduction-guides instead.  This brings this test inline with the same style as iter_alloc_deduction.pass.cpp

Reviewers: EricWF, dexonsmith

Reviewed By: EricWF

Subscribers: EricWF, vsapsai, vsk, cfe-commits

Differential Revision: https://reviews.llvm.org/D44103

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@327178 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/std/strings/basic.string/string.cons/iter_alloc_deduction.fail.cpp b/test/std/strings/basic.string/string.cons/iter_alloc_deduction.fail.cpp
index 65aba04..ce71007 100644
--- a/test/std/strings/basic.string/string.cons/iter_alloc_deduction.fail.cpp
+++ b/test/std/strings/basic.string/string.cons/iter_alloc_deduction.fail.cpp
@@ -9,8 +9,7 @@
 
 // <string>
 // UNSUPPORTED: c++98, c++03, c++11, c++14
-// UNSUPPORTED: clang-3.3, clang-3.4, clang-3.5, clang-3.6, clang-3.7, clang-3.8, clang-3.9, clang-4.0
-// UNSUPPORTED: apple-clang-6, apple-clang-7, apple-clang-8.0
+// XFAIL: libcpp-no-deduction-guides
 
 // template<class InputIterator,
 //      class Allocator = allocator<typename iterator_traits<InputIterator>::value_type>>