There was an issue with the build script, it got fixed but afaik it has never been recompiled since then.
If you recompile it manually (remember to set buildNativesProjects=true in gradle.properties ) it should work.
You can’t use x86 libs in jre x86_64, but this is not a problem since the build script compiles for both 32 bit and 64 bit if you launch it from a 64 bit os.