Update x86 requirement from 0.37.0 to 0.38.0 in /x86test
Update x86 requirement from 0.37.0 to 0.38.0 in /x86test

Updates the requirements on [x86](https://github.com/gz/rust-x86) to permit the latest version.
- [Release notes](https://github.com/gz/rust-x86/releases)
- [Commits](https://github.com/gz/rust-x86/compare/0.37.0...0.38.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
gz/rust-x86,gz/rust-x86