CMake: (fix) Threads dependency #4080

Job	Run time
Windows MSVC CMake REL TS	8m 40s
Windows MSVC CMake DBG TS	8m 7s
Windows MSVC CMake REL	16m 28s
Windows MSVC CMake DBG	18m 45s
Ubuntu gcc CMake REL TS	5m 26s
Ubuntu gcc CMake DBG TS	4m 23s
Ubuntu gcc CMake REL	10m 24s
Ubuntu gcc CMake DBG	9m 33s
Ubuntu gcc Autotools REL TS	6m 9s
Ubuntu gcc Autotools DBG TS	5m 49s
Ubuntu gcc Autotools REL	16m 28s
Ubuntu gcc Autotools DBG	24m 55s
Ubuntu gcc Autotools parallel (build only) REL TS	7m 13s
Ubuntu gcc Autotools parallel (build only) DBG TS	7m 11s
Ubuntu gcc Autotools parallel (build only) REL	7m 0s
Ubuntu gcc Autotools parallel (build only) DBG	9m 5s
MacOS Clang CMake REL TS	3m 17s
MacOS Clang CMake DBG TS	2m 22s
MacOS Clang CMake REL	7m 30s
MacOS Clang CMake DBG	9m 5s
Ubuntu gcc Autotools v1.6 default API (build only) DBG	11m 59s
Ubuntu gcc Autotools v1.8 default API (build only) DBG	8m 56s
Ubuntu gcc Autotools v1.10 default API (build only) DBG	10m 45s
Ubuntu gcc Autotools v1.12 default API (build only) DBG	11m 5s
Ubuntu gcc Autotools v1.14 default API (build only) DBG	11m 21s
Ubuntu gcc Autotools no deprecated symbols (build only) DBG	9m 7s
Ubuntu gcc Autotools -Werror (build only) DBG	9m 1s
Ubuntu gcc Autotools -Werror (build only) REL	7m 47s
Ubuntu gcc Autotools parallel -Werror (build only) DBG	6m 13s
Ubuntu gcc Autotools parallel -Werror (build only) REL	6m 18s
	4h 40m 22s

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