A couple of documentation items to fix #4224

Job	Run time
Windows MSVC CMake REL TS	8m 3s
Windows MSVC CMake DBG TS	9m 30s
Windows MSVC CMake REL	16m 26s
Windows MSVC CMake DBG	18m 21s
Ubuntu gcc CMake REL TS	5m 8s
Ubuntu gcc CMake DBG TS	3m 59s
Ubuntu gcc CMake REL	9m 54s
Ubuntu gcc CMake DBG	8m 44s
Ubuntu gcc Autotools REL TS	8m 43s
Ubuntu gcc Autotools DBG TS	7m 26s
Ubuntu gcc Autotools REL	20m 26s
Ubuntu gcc Autotools DBG	18m 0s
Ubuntu gcc Autotools parallel (build only) REL TS	6m 20s
Ubuntu gcc Autotools parallel (build only) DBG TS	6m 28s
Ubuntu gcc Autotools parallel (build only) REL	9m 11s
Ubuntu gcc Autotools parallel (build only) DBG	9m 47s
MacOS Clang CMake REL TS	4m 15s
MacOS Clang CMake DBG TS	2m 18s
MacOS Clang CMake REL	7m 1s
MacOS Clang CMake DBG	8m 47s
Ubuntu gcc Autotools v1.6 default API (build only) DBG	11m 19s
Ubuntu gcc Autotools v1.8 default API (build only) DBG	11m 35s
Ubuntu gcc Autotools v1.10 default API (build only) DBG	11m 12s
Ubuntu gcc Autotools v1.12 default API (build only) DBG	8m 59s
Ubuntu gcc Autotools v1.14 default API (build only) DBG	11m 58s
Ubuntu gcc Autotools no deprecated symbols (build only) DBG	11m 29s
Ubuntu gcc Autotools -Werror (build only) DBG	7m 25s
Ubuntu gcc Autotools -Werror (build only) REL	7m 47s
Ubuntu gcc Autotools parallel -Werror (build only) DBG	7m 32s
Ubuntu gcc Autotools parallel -Werror (build only) REL	7m 41s
	4h 45m 44s

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