treewide: use blas and lapack

This makes packages use lapack and blas, which can wrap different
BLAS/LAPACK implementations.

treewide: cleanup from blas/lapack changes

A few issues in the original treewide:

- can’t assume blas64 is a bool
- unused commented code

pkgs/applications/science/math/caffe/default.nix

@@ -9,7 +9,7 @@
 , opencv3
 , protobuf
 , doxygen
-, openblas
+, blas
 , Accelerate, CoreGraphics, CoreVideo
 , lmdbSupport ? true, lmdb
 , leveldbSupport ? true, leveldb, snappy
@@ -63,7 +63,7 @@ stdenv.mkDerivation rec {
       ++ ["-DUSE_LEVELDB=${toggle leveldbSupport}"]
       ++ ["-DUSE_LMDB=${toggle lmdbSupport}"];
 
-  buildInputs = [ boost gflags glog protobuf hdf5-cpp opencv3 openblas ]
+  buildInputs = [ boost gflags glog protobuf hdf5-cpp opencv3 blas ]
                 ++ lib.optional cudaSupport cudatoolkit
                 ++ lib.optional cudnnSupport cudnn
                 ++ lib.optional lmdbSupport lmdb