fix bash find invokation for gnu bash
fix bash find invokation for gnu bash


Former-commit-id: 434073e847f72bc5532792532e5bb629238dc46b [formerly feba2aa3035ecb761025867fceb7f739c453dc6b] [formerly feba2aa3035ecb761025867fceb7f739c453dc6b [formerly 04f090c976918d4d193d5ac9d02c43dc30b8223f]]
Former-commit-id: 47f1c66b28ba9c47b09d8263fca861a88fa117e1
Former-commit-id: 19ce1423724238d8fab0afde48ed13b5a5144fc3
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine