Fix typo in scipy f2py wrapper for nrm2

[hoodmane]

This is a one character change: nm2 ==> n2.

[hoodmane]

The patches to fblas from make-int-return-values seem to have introduced some problems. I'm not sure what happens if we revert the changes to fblas_l1, maybe that would be better.

[hoodmane]

This brings scipy.sparse fairly close to working:

> await pyodide.loadPackage(["scipy-tests", "pytest"]);
> let pytest = pyodide.pyimport("pytest");
> pytest.main(pyodide.toPy(["--pyargs", "scipy.sparse", "--continue-on-collection-errors",'-vv', '-k', 'not test_cornercase and not iterative and not test_exception']))
= 3 failed, 6417 passed, 1618 skipped, 62 deselected, 45 xfailed in 258.04s (0:04:18) =

The three failures are due to threading. test_cornercase and iterative both cause memory corruption =(

[rth]

Thanks for catching this!