added cd CURPATH at the beginning sed version in build.sh [skip CI]
added cd CURPATH at the beginning sed version in build.sh [skip CI]


Former-commit-id: d6e557ade391e3a1da9e03237547ab8326cbbf85 [formerly d6e557ade391e3a1da9e03237547ab8326cbbf85 [formerly 998407c06a6f64b26d1b1894dabafa03415d552b]]
Former-commit-id: 99c3613c99fcecc6a7375f11efa5d89f0ab870f6
Former-commit-id: c2cd5d7d1c1cc606986ceb7f7b392802597f731a
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine