deb: add missing 'install'
deb: add missing 'install'

Former-commit-id: 19f90d2caed3b808b056a294cf272467bb997485 [formerly 19f90d2caed3b808b056a294cf272467bb997485 [formerly 6600e1d9293ec0b0e4b5c9785c3c97aca5a796ce]]
Former-commit-id: 37dba72612596712ca2d6940fd479be75c88d955
Former-commit-id: 9268752ac148299fc9399510993281169b3e3cef
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine