bitbake: fetch2/git: use correct check to decide if the shallow tarball should be unpacked

The shallow_tarball check is never true due a check on the caller side.
The tarball check is not related to the code on the caller side.

(Bitbake rev: 086eddcf8c7520ff5c52ce2a11ca9bf5b5fe5d7e)

Signed-off-by: Urs Fässler <urs.fassler@bbv.ch>
Signed-off-by: Pascal Bach <pascal.bach@siemens.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/fetch2/git.py

@@ -476,7 +476,7 @@ class Git(FetchMethod):
         if os.path.exists(destdir):
             bb.utils.prunedir(destdir)
 
-        if ud.shallow and os.path.exists(ud.fullshallow) and self.need_update(ud, d):
+        if ud.shallow and os.path.exists(ud.fullshallow) and self.clonedir_need_update(ud, d):
             bb.utils.mkdirhier(destdir)
             runfetchcmd("tar -xzf %s" % ud.fullshallow, d, workdir=destdir)
         else: