ros_comm: 1.11.8-0 in 'indigo/distribution.yaml' [bloom]

Increasing version of package(s) in repository `ros_comm` to `1.11.8-0`:

- upstream repository: git@github.com:ros/ros_comm.git
- release repository: https://github.com/ros-gbp/ros_comm-release.git
- distro file: `indigo/distribution.yaml`
- bloom version: `0.5.11`
- previous version for package: `1.11.7-0`

## message_filters

- No changes

## ros_comm

- No changes

## rosbag

- No changes

## rosbag_storage

- No changes

## rosconsole

- No changes

## roscpp

```
* fix C++11 compatibility issue (#483 <https://github.com/ros/ros_comm/issues/483>)
```

## rosgraph

- No changes

## roslaunch

```
* remove implicit rostest dependency and use rosunit instead (#475 <https://github.com/ros/ros_comm/issues/475>)
* accept stdin input alongside files (#472 <https://github.com/ros/ros_comm/issues/472>)
```

## roslz4

- No changes

## rosmaster

- No changes

## rosmsg

- No changes

## rosnode

- No changes

## rosout

- No changes

## rosparam

- No changes

## rospy

```
* fix topic/connection statistics reporting code (#482 <https://github.com/ros/ros_comm/issues/482>)
```

## rosservice

- No changes

## rostest

- No changes

## rostopic

```
* fix handling of array index when being part of the topic (#480 <https://github.com/ros/ros_comm/issues/480>)
* support splice arguments in 'rostopic echo' (#480 <https://github.com/ros/ros_comm/issues/480>)
```

## roswtf

- No changes

## topic_tools

- No changes

## xmlrpcpp

- No changes