staging: Handle stale sysroot rebuild issue

If a stale sysroot object was found the complete stamp wasn't removed,
meaning later code could fail when the new link creation was attempted.
Ensure the stale complete stamp is also removed if present.

(From OE-Core rev: d7d26488f252d60628862ee114a4404e8d6cb6f1)

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

meta/classes/staging.bbclass

@@ -520,6 +520,8 @@ python extend_recipe_sysroot() {
                 bb.note("%s exists in sysroot, but is stale (%s vs. %s), removing." % (c, lnk, c + "." + taskhash))
                 sstate_clean_manifest(depdir + "/" + lnk, d, workdir)
                 os.unlink(depdir + "/" + c)
+                if os.path.lexists(depdir + "/" + c + ".complete"):
+                    os.unlink(depdir + "/" + c + ".complete")
         elif os.path.lexists(depdir + "/" + c):
             os.unlink(depdir + "/" + c)