[install] install openblas

This works if bob.math#4 (closed) is fixed.

install/from-scratch.sh

@@ -28,10 +28,6 @@ else
     CAFFE=
 fi
 
-# This is needed for toolchain. Since we just use 64-bit, I am not checking if
-# the system is 32 bit.
-export ARCH=64
-
 # For a complete list of dependencies, please read:
 # https://gitlab.idiap.ch/bob/bob/wikis/Dependencies
 echo "[>>] Creating environment ${NAME} for python ${PYTHON_VERSION} with bob dependencies..."
@@ -78,7 +74,6 @@ ${CONDA} create --yes -n ${NAME} \
   sphinx_rtd_theme \
   sqlalchemy=1.0.13 \
   tensorflow \
-  toolchain \
   virtualenv \
   vlfeat=0.9.20