remove spaces from two filenames

There are spaces in two icon's filenames.
```
usr/share/icons/Mint-X/apps/scalable/cairo-dock -c.svg
usr/share/icons/Mint-X/apps/scalable/cairo-dock -o.svg
```
This causes gtk-update-icon-cache to produce errors.
```
# gtk-update-icon-cache -tf /usr/share/icons/Mint-X
gtk-update-icon-cache: The generated cache was invalid.
```
Removing the spaces fixes the issue.