Fix the following issue:

BBC SVG logo doesnt show when printing
**Describe the bug**
When you want to print out an article, onto paper, like its 1976, the icon doesn't show

**To Reproduce**
Steps to reproduce the behaviour:

1. Go to an article with the Brand in
2. Try to print
3. See the svg isn't visible

**Expected behaviour**
The SVG is visible

**Screenshots**
![image](https://user-images.githubusercontent.com/11341355/50640807-e2071180-0f5d-11e9-8162-80e75551c99b.png)

**Desktop (please complete the following information):**

- OS: Mac
- Browser: Chrome
- Version: 71.0.3578.98

- [x] Initially labelled with ["bug"](https://github.com/BBC-News/psammead/labels/bug)