re enable Fortran optimization flag on windows
re enable Fortran optimization flag on windows

partial revert of https://github.com/xianyi/OpenBLAS/commit/299cdcdc29999d591fcb300630d50b2986bfb6fc
from #696, was not explained why that was needed
buffer51/OpenBLAS,xianyi/OpenBLAS,buffer51/OpenBLAS,xianyi/OpenBLAS,xianyi/OpenBLAS,buffer51/OpenBLAS,buffer51/OpenBLAS,kortschak/OpenBLAS,grisuthedragon/OpenBLAS,grisuthedragon/OpenBLAS,grisuthedragon/OpenBLAS,kortschak/OpenBLAS,buffer51/OpenBLAS,grisuthedragon/OpenBLAS,buffer51/OpenBLAS,kortschak/OpenBLAS,xianyi/OpenBLAS,grisuthedragon/OpenBLAS,xianyi/OpenBLAS,kortschak/OpenBLAS,xianyi/OpenBLAS,xianyi/OpenBLAS,kortschak/OpenBLAS,grisuthedragon/OpenBLAS,kortschak/OpenBLAS,xianyi/OpenBLAS,buffer51/OpenBLAS,kortschak/OpenBLAS,buffer51/OpenBLAS,kortschak/OpenBLAS,grisuthedragon/OpenBLAS,kortschak/OpenBLAS,grisuthedragon/OpenBLAS