Tests: Extend RunCMake.Ninja filesystem delays
On filesystems with 1s resolution the run_sub_cmake
cases fail
occasionally when the 1 second sleep does not cause files to have
a different time. Use 3 seconds instead.
Edited by Brad King
On filesystems with 1s resolution the run_sub_cmake
cases fail
occasionally when the 1 second sleep does not cause files to have
a different time. Use 3 seconds instead.