More of N4258 implementation. Mark all of our test_allocators as noexcept constructible. Make the constructors for basic_string noexcept all the time (under C++14). Update tests to reflect the new world order. More to come.

llvm-svn: 238957
diff --git a/libcxx/test/support/test_allocator.h b/libcxx/test/support/test_allocator.h
index 683fac2..03bd390 100644
--- a/libcxx/test/support/test_allocator.h
+++ b/libcxx/test/support/test_allocator.h
@@ -17,6 +17,8 @@
 #include <climits>
 #include <cassert>
 
+#include "test_macros.h"
+
 class test_alloc_base
 {
 protected: