aarch64 runner: cxx-qt-build reported QtMissing with a correct
QT_ROOT_DIR — set QMAKE/CMAKE_PREFIX_PATH explicitly (as macOS/Windows
already do) and print the qmake version before the build.
macOS: StreamType::output_sample_rate (macOS-only) matched Rodio only;
Direct is intentionally not cfg-gated, so the macOS build failed with
E0004. A direct sink answers with its opened rate.
cc
vicrodh
37a1a75de1