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: 998407c06a6f64b26d1b1894dabafa03415d552b
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine