Add missing ceres/internal/port.h to two header files. Without these these files cannot be included on their own. https://github.com/ceres-solver/ceres-solver/issues/410 Change-Id: I87ca91d15f5ab2053e43480ecbde74779125c709
Ceres Solver is an open source C++ library for modeling and solving large, complicated optimization problems. It is a feature rich, mature and performant library which has been used in production at Google since 2010. Ceres Solver can solve two kinds of problems.
Please see ceres-solver.org for more information.