Fix StrategoXT compilation on JDK9+ and sync ECJ versions.
Fix StrategoXT compilation on JDK9+ and sync ECJ versions.

- Update antrun to 3.0.0 and its ECJ to 3.25.0.
- Update plexus-compiler-eclipse to 2.8.8 and its ECJ to 3.25.0.

metaborg/spoofax-deploy,metaborg/spoofax-deploy,metaborg/spoofax-deploy