cmake GRAPHBLAS_HAS_OPENMP examples

DrTimothyAldenDavis/GraphBLAS CMakeLists.txt :117 

message ( STATUS "GraphBLAS has OpenMP: ${GRAPHBLAS_HAS_OPENMP}" )

FalkorDB/FalkorDB deps/GraphBLAS/CMakeLists.txt :117 

message ( STATUS "GraphBLAS has OpenMP: ${GRAPHBLAS_HAS_OPENMP}" )

DrTimothyAldenDavis/SuiteSparse GraphBLAS/CMakeLists.txt :117 

message ( STATUS "GraphBLAS has OpenMP: ${GRAPHBLAS_HAS_OPENMP}" )