Build Cache for Xcode v0.14.7

[system]

What’s Changed

• Bump bitrise-build-cache CLI to v2.8.15 (SSW-3019 instrumentation-fingerprint probe in the gradle-mirrors init script; no Xcode-side change).

Release 0.14.7 · bitrise-steplib/bitrise-step-activate-build-cache-for-xcode