Fix conda install on distributions with strict POSIX sh (pytorch#91371)

See also conda/conda#10431

Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Pull Request resolved: pytorch#91371
Approved by: https://github.com/albanD

.circleci/docker/common/install_conda.sh

@@ -42,8 +42,8 @@ if [ -n "$ANACONDA_PYTHON_VERSION" ]; then
 
   pushd /tmp
   wget -q "${BASE_URL}/${CONDA_FILE}"
-  chmod +x "${CONDA_FILE}"
-  as_jenkins ./"${CONDA_FILE}" -b -f -p "/opt/conda"
+  # NB: Manually invoke bash per https://github.com/conda/conda/issues/10431
+  as_jenkins bash "${CONDA_FILE}" -b -f -p "/opt/conda"
   popd
 
   # NB: Don't do this, rely on the rpath to get it right