Modify the check if OPENMP_PROC_BIND is set to true
Modify the check if OPENMP_PROC_BIND is set to true

Emit a warning instead of a fatal.
Accept proc bind set to spread.
Some OpenMP implementations change proc bind to spread even
though OPENMP_PROC_BIND is set to true.

BioDynaMo/biodynamo,BioDynaMo/biodynamo,BioDynaMo/biodynamo,BioDynaMo/biodynamo