require muparser for manifold test

diff --git a/tests/manifold/tensor_product_manifold_01.output b/tests/manifold/tensor_product_manifold_01.with_muparser=true.output
similarity index 100%
rename from tests/manifold/tensor_product_manifold_01.output
rename to tests/manifold/tensor_product_manifold_01.with_muparser=true.output

diff --git a/tests/manifold/tensor_product_manifold_02.output b/tests/manifold/tensor_product_manifold_02.with_muparser=true.output
similarity index 100%
rename from tests/manifold/tensor_product_manifold_02.output
rename to tests/manifold/tensor_product_manifold_02.with_muparser=true.output