ocl: improved tuning script #1411

Job	Run time
build-on-cuda (OPENMP=ON)	12m 17s
build-and-test (MPI=ON, OPENMP=ON, SMM=blas, openmpi)	8m 41s
build-and-test (MPI=ON, OPENMP=ON, SMM=blas, mpich)	7m 57s
build-on-opencl (OPENMP=ON, SMM=libxsmm)	11m 47s
build-on-rocm (OPENMP=ON)	11m 43s
build-and-test (MPI=ON, OPENMP=ON, SMM=libxsmm, openmpi)	7m 31s
pre-commit	1m 56s
build-and-test (MPI=ON, OPENMP=ON, SMM=libxsmm, mpich)	7m 51s
build-and-test (MPI=ON, OPENMP=OFF, SMM=blas, openmpi)	4m 26s
build-and-test (MPI=ON, OPENMP=OFF, SMM=blas, mpich)	5m 30s
build-and-test (MPI=ON, OPENMP=OFF, SMM=libxsmm, openmpi)	5m 38s
build-and-test (MPI=ON, OPENMP=OFF, SMM=libxsmm, mpich)	5m 20s
build-and-test (MPI=OFF, OPENMP=ON, SMM=blas, openmpi)	7m 14s
build-and-test (MPI=OFF, OPENMP=ON, SMM=libxsmm, openmpi)	7m 44s
build-and-test (MPI=OFF, OPENMP=OFF, SMM=blas, openmpi)	3m 56s
build-and-test (MPI=OFF, OPENMP=OFF, SMM=libxsmm, openmpi)	4m 21s
Combine & check coverage.	53s
	1h 54m 45s

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