Reimport lapack and blas from gmx 5.1.5

Previous import was dating back to gromacs 4.6.7.
This brings in a few changes, notably:

- source tree was modified

- some thresholds were modified
(see https://github.com/gromacs/gromacs/commit/97161d2601f4f98a45d49de2ef8f630f18c94455)