ENH: replace OSspecific clockValue with std::chrono version (#1278)

applications/test/OSspecific/Make/files

applications/test/OSspecific/Make/options

applications/test/OSspecific/Test-OSspecific.C

applications/test/POSIX/Make/files

applications/test/clock/Make/files

applications/test/clock/Make/options

applications/test/clock/Test-clock.C

src/OSspecific/POSIX/Make/files

src/OpenFOAM/Make/files

src/OpenFOAM/global/clock/clock.C

src/OpenFOAM/global/clockTime/clockTime.C

src/OpenFOAM/global/clockTime/clockTime.H

src/OpenFOAM/global/clockValue/clockValue.C

src/OpenFOAM/global/clockValue/clockValue.H