Openblas has it's own optimised versions of netlib lapack that it
bundles into `-lopenblas` so won't conflict with those libs. Also
enable RecursiveLAPACK.
From `Makefile.rule`:
```
Force number of make jobs. The default is the number of logical CPU of the host.
This is particularly useful when using distcc.
A negative value will disable adding a -j flag to make, allowing to use a parent
make -j value. This is useful to call OpenBLAS make from an other project
makefile
MAKE_NB_JOBS = 2
```
fixes#1651
Tony Theodore