Add ./ to --checkpoint_inception (#1951)
Add ./ to --checkpoint_inception (#1951)

Fixes #1841
jch1/models,jiaphuan/models,cshallue/models,cshallue/models,xcyan/models,jiaphuan/models,jch1/models,tombstone/models,tombstone/models,derekjchow/models,cshallue/models,xcyan/models,alexgorban/models,cshallue/models,xcyan/models,jch1/models,sshleifer/object_detection_kitti,zbigniewwojna/text-rcnn,cshallue/models,xcyan/models,derekjchow/models,tombstone/models,sshleifer/object_detection_kitti,jch1/models,derekjchow/models,sshleifer/object_detection_kitti,alexgorban/models,sshleifer/object_detection_kitti,tombstone/models,sshleifer/object_detection_kitti,alexgorban/models,derekjchow/models,tombstone/models,jiaphuan/models,jch1/models,derekjchow/models,jiaphuan/models,sshleifer/object_detection_kitti,alexgorban/models,jiaphuan/models,tombstone/models,xcyan/models,jiaphuan/models,alexgorban/models,xcyan/models,jch1/models