bitbake: fetch/git: Ensure tags work with shallow clones

If we want to validate a tag when using shallow clones, we need to ensure
the tag is imported to the clone. Adding to extra_refs allows this to happen
ensuring tag validation in shallow clones works.

(Bitbake rev: 03945475886b8d31c7eccc80fe594ab5306bcf5d)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/fetch2/git.py

@@ -674,6 +674,8 @@ class Git(FetchMethod):
         for line in all_refs_remote:
             all_refs.append(line.split()[-1])
         extra_refs = []
+        if 'tag' in ud.parm:
+            extra_refs.append(ud.parm['tag'])
         for r in ud.shallow_extra_refs:
             if not ud.bareclone:
                 r = r.replace('refs/heads/', 'refs/remotes/origin/')