add some needed includes to build with boost 1.79 beta

[spoonincode]

Change Description

Adds some includes needed to build with boost 1.79 beta.

The missing includes are solely related to fstream & boost::filesystem::fstream. The boost filesystem docs (even as far back as 1.66) are clear that #include <boost/filesystem.hpp> does not include file stream support. Internal changes to boost filesystem in 1.79 (namely removal of string_file) means that boost/filesystem/fstream.hpp no longer get implicitly included via boost/filesystem.hpp, so we need to be explicit about this.

Change Type

Select ONE:

• [ ] Documentation

• [ ] Stability bug fix

• [x] Other

• [ ] Other - special case

Testing Changes

Select ANY that apply:

• [ ] New Tests

• [ ] Existing Tests

• [ ] Test Framework

• [ ] CI System

• [ ] Other

Consensus Changes

• [ ] Consensus Changes

API Changes

• [ ] API Changes

Documentation Additions

• [ ] Documentation Additions