[farmhash] support find_package(farmhash)

[luncliff]

Changes

No source changes.
Update portfile.cmake for later https://github.com/microsoft/vcpkg-tool versions.

References

• https://github.com/google/farmhash
• [farmhash] support Windows build microsoft/vcpkg#20506

Configuration

"vcpkg-configuration.json" changes for the release.

{
    "registries": [
        {
            "kind": "git",
            "repository": "https://github.com/luncliff/vcpkg-registry",
            "packages": [
                "farmhash"
            ],
            "baseline": "..."
        }
    ]
}