build

SYCL-specific env and README entry #431

Job	Run time
gnu/9.4.0	38s
gnu/9.4.0 --with-gpu --with-loki --with-atlas	2m 36s
gnu/9.4.0 --with-gpu --with-loki --with-atlas --with-mpi	2m 47s
gnu/9.4.0 --single-precision --with-gpu --with-loki --with-atlas --with-mpi	2m 58s
gnu/9.4.0 --with-serialbox	1m 10s
gnu/9.4.0 --with-serialbox --with-gpu --with-loki --with-atlas	3m 1s
gnu/9.4.0 --with-serialbox --with-gpu --with-loki --with-atlas --with-mpi	4m 14s
gnu/9.4.0 --with-serialbox --single-precision --with-gpu --with-loki --with-atlas --with-mpi	3m 10s
gnu/9.4.0 --cloudsc-fortran-pyiface=ON --cloudsc-python-f2py=ON	1m 55s
nvhpc/21.9 --with-gpu --with-loki --with-cuda	12m 43s
nvhpc/21.9 --single-precision --with-gpu --with-loki --with-cuda --with-atlas	14m 1s
nvhpc/21.9 --with-serialbox --with-gpu --with-loki --with-cuda --with-atlas	10m 34s
nvhpc/23.5 --with-gpu --with-loki --with-cuda	10m 23s
nvhpc/23.5 --single-precision --with-gpu --with-loki --with-cuda --with-atlas	14m 0s
nvhpc/23.5 --with-serialbox --with-gpu --with-loki --with-cuda --with-atlas	11m 7s
	1h 35m 17s

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