The `memx` doesn't compile correctly in big-endian platforms. For the time being let's use the `==` operator for slice comparison. This change may be reconsidered later if the `==` operators proves to be too slow.

When reading `i32` integers from WASM memory the integers must be swapped if we are in big-endian platforms because WASM stores the integers in little-endian format regardless of the host's endianness.

The debug build depends on `yara` for benchmarks, but this crate is not built correctly in the s390x platform.

When a commit is pushed to an open pull request the workflow will run twice: once for the push and once for the pull request, unless we specified that workflow for pull requests should run only when the pull request is opened or reopened.