Fix incorrect use of aligned allocation in get_temporary_buffer.

llvm-svn: 345403
diff --git a/libcxx/include/memory b/libcxx/include/memory
index ef35cc2..783d94c 100644
--- a/libcxx/include/memory
+++ b/libcxx/include/memory
@@ -2016,7 +2016,7 @@
         __n = __m;
     while (__n > 0)
     {
-#if !defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION)
+#if !defined(_LIBCPP_HAS_NO_ALIGNED_ALLOCATION)
     if (__is_overaligned_for_new(__alignof(_Tp)))
         {
             std::align_val_t __al =