[!767] Get rid off fortran compiler usage for Lapack/Blas.

Merge branch 'features/no-fortran' into 'master'

ref:core/dune-common\> FindLAPACK and FindBLAS check for the name mangling
with added underline as a fallback, anyway. Hence there is no need for using a
Fortran compiler. With this commit we now simply add another check for a
LAPACK function to see whether it has an underline added and adapt the
existing macro in config.h accordingly.

Closes [#184]

See merge request [!767]

  [#184]: gitlab.dune-project.org/NoneNone/issues/184
  [!767]: gitlab.dune-project.org/core/dune-common/merge_requests/767


Closes #184