[Fedora-packaging] Issues with blender dependencies

[Philipp Bartsch]

Hey,

First up, I am not sure if this is the right place for reports like
this. If there is a better place please let me know.

Blender seems to to be linked to jemalloc but it is not installed as a
dependency.

```
$ # installing blender
$ sudo dnf install blender
[...]
$ blender
blender: error while loading shared libraries: libjemalloc.so.2: cannot open shared object
file: No such file or directory
$ ldd $(which blender) | grep "not found"
	libjemalloc.so.2 => not found
$ # installing missing jemalloc
$ sudo dnf install jemalloc
[...]
$ # blender now starts without issues
$ blender
```

Btw. I am running Fedora 28 on x86_64.


- Phil