unsupported preprocessor arg: -U_FORTIFY_SOURCE

When compiling aws-lc-sys 0.35.0 cargo-zigbuild failed due to unsupported preprocessor arg

https://github.com/cargo-bins/cargo-binstall/actions/runs/20676843985/job/59365599140#step:6:486

aws-lc-sys is the default tls backend used by reqwest, I suspect this is going to break lots of cross compilation builds.