[Fix] Build error vision_darknet_detect of develop on Ubuntu 14.04

[kitsukawa]

Bug

Expected Behavior

Autoware should be build without errors.

Actual Behavior

/home/kitsukawa/Autoware/ros/src/computing/perception/detection/vision_detector/packages/vision_darknet_detect/src/vision_darknet_detect.cpp: In member function ‘std::vector<std::basic_string<char> > Yolo3DetectorNode::read_custom_names_file(const string&)’:
/home/kitsukawa/Autoware/ros/src/computing/perception/detection/vision_detector/packages/vision_darknet_detect/src/vision_darknet_detect.cpp:294:37: error: variable ‘std::ifstream file’ has initializer but incomplete type
     std::ifstream file(in_names_path);
                                     ^

Specifications

• Ubuntu version: 14.04
• ROS version: Indigo
• Autoware branch: develop

[amc-nu]

Thanks @kitsukawa