Add USE_CONDA_BUILD to prepare-and-run-pylint.sh

ci_support="https://gitlab.tiker.net/inducer/ci-support/raw/master"

curl -L -O -k "${ci_support}/build-py-project.sh"

curl -L -O -k "${ci_support}/run-pylint.py"

if ! test -f .pylintrc.yml; then

  curl -o .pylintrc.yml "${ci_support}/.pylintrc-default.yml"

fi

if test "$USE_CONDA_BUILD" == "1"; then

  curl -L -O -k "${ci_support}/build-py-project-within-miniconda.sh"

  source build-py-project-within-miniconda.sh

else

  curl -L -O -k "${ci_support}/build-py-project.sh"

  source build-py-project.sh

fi

$PY_EXE -m pip install pylint PyYAML