genmsg: 0.5.3-0 in 'indigo/distribution.yaml' [bloom]

Increasing version of package(s) in repository `genmsg` to `0.5.3-0`:

- distro file: `indigo/distribution.yaml`
- bloom version: `0.5.10`
- previous version for package: `0.5.2-0`

## genmsg

```
* escape messages to avoid CMake warning (#49 <https://github.com/ros/genmsg/issues/49>)
```