Test failed on s390x

[ghost]

https://kojipkgs.fedoraproject.org//work/tasks/1231/82321231/build.log

---- ignore_memset stdout ----
thread 'ignore_memset' panicked at 'assertion failed: (left == right)
left: Pixmap { data: "...", width: 100, height: 100 },
right: Pixmap { data: "...", width: 100, height: 100 }', tests/clip.rs:174:5
note: run with RUST_BACKTRACE=1 environment variable to display a backtrace

[RazrFalcon]

This is not a supported target. Only x86 and arm64 are guarantee to work.