[A/IO/GocadIO] Gocadreader - Fix reading line if Gocad file is represented as CR+LF.

If Gocad file is represented in windows style CR+LF tokens read may have \r appended. Logic of Gocadreader depending on string comparison will then fail. This merge request does not fix all readlines. Only token that are the last of each line have been affected. e.g. ZPOSITIVE Elevation^M$ ZPOSITIVE is not affected END_ORIGINAL_COORDINATE_SYSTEM^M$ is affected

The alternative of taking a generic approach with rewriting the file was considered, but our tools should be platform agnostic. Better solutions that have std::getline read in without LF must be found with next improvements.