or-tools may have trouble linking with shared-libs enabled

[j2kun]

This only affects the CMake build after article 12 (A Global Optimization and Dataflow Analysis) and before https://github.com/j2kun/mlir-tutorial/pull/31

See the discussion in https://github.com/j2kun/mlir-tutorial/issues/30 for details and https://github.com/j2kun/mlir-tutorial/issues/30#issuecomment-1824588337 for the solution and links to further discussion.