octave: Add version 10.2

The build requires that the blas libraries installed in the
system are removed. Otherwise it is more or less impossible
to control which blas octave and the accompanying libraries
are going to use at build time. After install everything is
fine and lapack/old openblas can return.

To have more AdHoc compatibility with Matlab a few octave
packages are also installed (e.g. the statistics package).