Fixing the location of build.sh gets rid of ENTRYPOINT. Which opens a possibility to implement different commands like:
````bash
docker run -ti expat compile
docker run -ti expat run <fuzzer_name> <input_data>
````
and keep the knowledge of build script location.
This is a breaking change.
- Remove requirement of specifying dockerfile in Jenkinsfile. Assume it
is in the library directory by deefault.
- Try to copy any *.dict or *.options files to output directory.