add support for OpenBLAS as toolchain lib for linear algebra
add support for goolf toolchain
fix Lapack import
no BLACS in goolf
allow empty list of BLACS modules
also define list of MT BLACS libs empty, and handle that properly
Merge branch 'develop' into openblas
LAPACK is not part of goolf directly, only indirectly as an OpenBLAS build dep
OpenBLAS also provides LAPACK via libopenblas.x
Merge pull request #537 from boegel/openblas

add support for OpenBLAS as toolchain lib for linear algebra