pkgstyle: use Distro.match in template selection

This reuses common code as well as allows for overriding template
matching in adistro.Distro child classes.

apkg/pkgstyle.py

@@ -40,7 +40,7 @@ def get_pkgstyle_for_template(path):
 def get_pkgstyle_for_distro(distro):
     for style in PKGSTYLES.values():
         for sup_distro in style.SUPPORTED_DISTROS:
-            if sup_distro in distro.names:
+            if distro.match(sup_distro):
                 return style
     return None