fix(scanner): ordering CPU time was wrong due to wrong waiting order #331

Job	Run time
windows (X64, Release)	10m 48s
linux (amd64, gcc-debug-ninja)	2m 1s
windows (X64, Debug)	10m 41s
linux (amd64, gcc-release-ninja)	1m 0s
linux (amd64, oldgcc-debug-make)	2m 7s
linux (amd64, clang-release-ninja)	54s
linux (amd64, clang-release-ninja-static)	1m 48s
linux (amd64, oldclang-debug-make)	1m 50s
linux (arm64v8, gcc-debug-ninja)	4m 10s
linux (arm64v8, gcc-release-ninja)	2m 37s
linux (arm64v8, oldgcc-debug-make)	4m 24s
linux (arm64v8, clang-release-ninja)	5m 26s
linux (arm64v8, clang-release-ninja-static)	4m 8s
linux (arm64v8, oldclang-debug-make)	14m 3s
linux (amd64, clang-asan-ninja)	4m 10s
linux (amd64, clang-tsan-ninja)	2m 1s
linux (amd64, clang-ubsan-ninja)	1m 4s
linux (amd64, gcc-debug-noperfmon-ninja)	1m 58s
	1h 15m 10s

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