Fix non-empty commit message for OpenEmbedded when no changes (#234)

- Fix a wild-card expansion that was accidentally matching more than
  just the version portion of recipe filenames.

- This commit resolves issue #227.

superflore/generators/bitbake/gen_packages.py

@@ -56,7 +56,7 @@ def regenerate_pkg(
         component_name,
         recipe,
     )
-    existing = glob.glob('{}*.bb'.format(prefix))
+    existing = glob.glob('{}_*.bb'.format(prefix))
     previous_version = None
     if preserve_existing and existing:
         ok("recipe for package '%s' up to date, skipping..." % pkg)