Octave 9.4.0 uses system BLAS

[thomas]

The build mistakenly picks up the system BLAS (/usr/lib/libopenblas.so), fails the version -blas check with ans = OpenBLAS (config: unknown) instead of
ans = OpenBLAS (config: OpenBLAS 0.3.23 DYNAMIC_ARCH NO_AFFINITY Zen MAX_THREADS=48)
Also some matrix operations are around 7-10 times slower, compared to other builds.

So yank build 0, and maybe also put a fresh BLAS into our system?