Philippe 07/12/2021: OpenACC: fix: remove acc loop independent if atomic not set (to compute correctly)
Ideally, the loop independent + atomic should be set but nvhpc 21.9 crashes

Philippe 30/11/2021: Cray compiler problem: workaround compiler bug by changing intent of file (in->inout)

Juan 16/11/2021: mode_openacc_set_device.f90,tools.f90, add _FAKEOPENACC for compile in OPENACCDEFONLY with gfortran/ifort etc ...

Philippe 03/11/2021: Sources_neg_correct: always allocate zls (necessary to prevent crash with mppdb_check of it)

(modif was erroneously commited from development code)

Philippe 26/10/2021: OpenACC: create GT1DFLAT buffer that can be used for any size and shape arrays (logical)

Philippe 12/10/2021: OpenACC: Sources_neg_correct: replace where by do concurrent (workaround for nvhpc bug)

Philippe 12/10/2021: OpenACC: call get_halo_d only when necessary for blowsnwow + add number for message