bitbake: bitbake: bitbake-layers: add skip reason to output

Currently we inform the user that some package/layer is skipped but we
don't print the reason albeit bitbake knows the reason. So currently it
looks like:

gtk+:
  meta-oe              2.24.32 (skipped)

With this change the output prints the skip reason which is very helpful
for debugging:

gtk+:
  meta-oe              2.24.32 (skipped: one of 'x11 directfb' needs to be in DISTRO_FEATURES)

(Bitbake rev: 253aa584b04f4e5c6e7b16904a9e242a4f5cbd35)

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit d43e72db4f7c8b47d91d99ed54ce30e9ee898de1)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bblayers/query.py

@@ -150,7 +150,7 @@ skipped recipes will also be listed, with a " (skipped)" suffix.
         def print_item(f, pn, ver, layer, ispref):
             if not selected_layer or layer == selected_layer:
                 if not bare and f in skiplist:
-                    skipped = ' (skipped)'
+                    skipped = ' (skipped: %s)' % self.tinfoil.cooker.skiplist[f].skipreason
                 else:
                     skipped = ''
                 if show_filenames: