Add minimal test to make sure boost iterator-like iterators are compatible with Boost.Container. Example taken from Trac 12698 (https://svn.boost.org/trac10/ticket/12698)

test/boost_iterator_comp_test.cpp

@@ -0,0 +1,13 @@
+#include <boost/container/string.hpp>
+#include <boost/archive/iterators/binary_from_base64.hpp>
+
+int main()
+{
+    using String = boost::container::string;
+    using Iterator = boost::archive::iterators::binary_from_base64<String::iterator>;
+
+    String s;
+    s.resize(111);
+    String s2;
+    s2.assign(Iterator{s.begin()},Iterator{s.end()});
+}