Update postBuild

postBuild

-pip install --upgrade gmsh
-cd $HOME
-git clone https://github.com/pybind/pybind11.git
-cd pybind11
-git checkout v2.4.3
-cd $HOME
-export FENICS_VERSION=$(python3 -c"import ffc; print(ffc.__version__)")
-git clone --branch=$FENICS_VERSION https://bitbucket.org/fenics-project/dolfin
-git clone https://bitbucket.org/fenics-project/mshr
-cd mshr/
-git checkout 2019.1.0
-mkdir -p $HOME/build/mshr $HOME/build/dolfin $HOME/build/pybind11
-cd $HOME/build/pybind11
-cmake $HOME/pybind11/ -DPYBIND11_TEST=off  -DCMAKE_INSTALL_PREFIX=$HOME/install/
-make install -j 4
-export pybind11_DIR=$HOME/install/pybind11/share/cmake/pybind11/
-cd $HOME/build/dolfin
-cmake $HOME/dolfin -DCMAKE_INSTALL_PREFIX=$HOME/install/
-make install -j 4
-cd $HOME/build/mshr
-source $HOME/install/share/dolfin/dolfin.conf
-cmake $HOME/mshr/ -DCMAKE_INSTALL_PREFIX=$HOME/install/
-make install -j 4
-cd $HOME/dolfin/python
-${KERNEL_PYTHON_PREFIX}/bin/pip install . --user
-cd $HOME/mshr/python
-${KERNEL_PYTHON_PREFIX}/bin/pip install . --user
-cd $HOME
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+pip install --upgrade gmsh
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