Warning on installation

On debian testing I get the following warning when I do `ninja install`:
```
Warning: trying to copy a symlink that points to a file. This will copy the file,
but this will be changed in a future version of Meson to copy the symlink as is. Please update your
build definitions so that it will not break when the change happens.
```

my meson version:
```
$ meson -v
0.60.3
```