pre-divergence: update VM files description
pre-divergence: update VM files description

Former-commit-id: 7e8032bd08a5d67b72e24e6e664c800b9c19757c [formerly 2e6ff836064375e007f6660d204813662d32e2f2]
Former-commit-id: bd7aae86642c5c1de453d04ff0d70388d0d5bff5
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine