Release v0.15.2 via Buildbot #74

Job	Run time
ci / build-libcxx64	14m 26s
ci / buildopenssl64	7m 36s
ci / buildopenssl32	4m 58s
ci / build-protobuf	7m 27s
ci / build-libcxx32	16m 9s
ci / buildangle	2m 30s
ci / build-m1 / openssl (macos-latest, 11.0, arm64, darwin64-arm64)	6m 27s
ci / build-m1 / angle (macos-latest, 11.0, arm64)	25m 44s
ci / buildopenssl	2m 30s
ci / build-m1 / build (false, macos-latest, arm64, 11.0, {}, brew install autoconf automake echo 'set(CMAKE_SYSTE...	2m 38s
ci / build-libcxx	2m 35s
ci / build (10.10.0, 0, http://download.qt.io/online/qtsdkrepository/mac_x64/desktop/qt5_592/, 5.9.2, ...	10m 27s
ci / build (10.12.0, 1, http://download.qt.io/online/qtsdkrepository/mac_x64/desktop/qt5_5113/, 5.11.3...	12m 22s
ci / build (10.13.0, 2, http://download.qt.io/online/qtsdkrepository/mac_x64/desktop/qt5_5150/, 5.15.0...	9m 52s
ci / publish	14m 59s
	2h 20m 40s

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