fix auditwheel patching

Author: skvark

travis_config.sh

@@ -17,7 +17,11 @@ function bdist_wheel_cmd {
     CI_BUILD=1 pip wheel --verbose --wheel-dir="$PWD/dist" . $BDIST_PARAMS
     cp dist/*.whl $abs_wheelhouse
     if [ -z "$IS_OSX" ]; then
-      /opt/python/cp37-cp37m/bin/python patch_auditwheel_whitelist.py
+      TOOLS_PATH=/opt/_internal/tools
+      /opt/python/cp37-cp37m/bin/python -m venv $TOOLS_PATH
+      source $TOOLS_PATH/bin/activate
+      python patch_auditwheel_whitelist.py
+      deactivate
     fi
     if [ -n "$USE_CCACHE" -a -z "$BREW_BOOTSTRAP_MODE" ]; then ccache -s; fi
 }