Update clocks_handler.f90: fixed broken clock output and harmonized spacing

For the WALL time output in the case of mhour>0 there was given "nmin" as first variable for the output string which was wrongly placed there. Additionally, the spacing of all d-h-m-s outputs where changed in a way, that the Words "CPU" and "WALL" are all in one row with the output in seconds only [if defined(__CLOCK_SECONDS)].