test_tool: Let Cargo tell us where imageflow_tool resides

imazen / imageflow

High-performance image manipulation for web servers. Includes imageflow_server, imageflow_tool, and libimageflow

https://docs.imageflow.io/

GNU Affero General Public License v3.0

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Open andersk opened 2 months ago

andersk commented 2 months ago

Fixes cargo test with CARGO_TARGET_DIR set.