Handle OpenJDK "jmod" files
Starting with the version 9 and the new module system OpenJDK has .jmod files containing compiled classes and resources. This container format is basically a ZIP file prefixed with 4 bytes: "4A 4D 01 00". Could you please handle these files in strip-nondeterminism, clamping the timestamps and sorting the entries? jmod files can be found in the openjdk-11-jdk package, in the /usr/lib/jvm/java-11-openjdk-amd64/jmods/ directory.