.gitignore: add build-rpm
.gitignore: add build-rpm


Former-commit-id: d985ec7800a494c4399b067ec11eb534e3400618 [formerly 9fe04d2eafc9e8b5950e7e07c7dc0b4ccf3a9679]
Former-commit-id: 61d425e7101f43a48f9604ce4782a5d9dc459382
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine