Cannot build compiler for JVM as Debian package
When building compiler from source (by installing sbt, all dependencies and running `sbt compilerJVM/debian:packageBin`) I've got this error:

```
[error] (compilerJVM/debian:stage) java.lang.IllegalArgumentException: requirement failed: Source file '/some/not/important/path/kaitai_struct_compiler/jvm/src/main/resources' does not exist.
```

As a dirty workaround I manually created empty directory `resources`, package was then successfully created. I guess it has something to do with this lines in file `build.sbt`:

```
linuxPackageMappings += LinuxPackageMapping(Map(
      new File("jvm/src/main/resources") -> "/usr/share/kaitai-struct"
    )),
```

Or maybe I am missing something?