Add $_PXPATH__BIN override to %check

packaging/template.spec

 
 %check
 make test \
-    SHELLFU_PATH=%{buildroot}/%{_datadir}/shellfu/include-bash
+    SHELLFU_PATH=%{buildroot}/%{_datadir}/shellfu/include-bash \
+    _PXPATH__BIN=%{buildroot}/%{_libexecdir}/shellfu-bash-pxpath/pxpath
 
 %files
 %doc %{_docdir}/%{name}/README.md