feat: test generates symlink in dev dir for easy access to last compilation

dev/.gitignore

@@ -1 +1,2 @@
 test-output
+stdouterr

dev/testit

@@ -112,6 +112,7 @@ if check_compilers; then
     if compile; then
 	if test "$@"; then
 	    echo "completed with exit code $?"
+	    ln -sfn "${oname}" "${project_root}/dev/stdouterr"
 	fi
     fi
 else