tests: add test for builder-pack:set projectoml-path

tests/apps/python/cnb/1/bin/build

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+layers_dir=$1
+
+echo "Building with buildpack 1"
+bp_layer=$layers_dir/1
+bp_env_dir=$bp_layer/env
+mkdir -p $bp_env_dir
+
+echo "TESTENV_1" > $bp_env_dir/TESTENV
+
+echo "[types]" > ${bp_layer}.toml
+echo "launch = true" >> ${bp_layer}.toml
+echo "build = true" >> ${bp_layer}.toml
+echo "cache = true" >> ${bp_layer}.toml