distrodata.bbclass: fix typo, Upsteam -> Upstream

(From OE-Core rev: 09c448b42d1ae0e85b91a61bb814384279b1b6e8)

Signed-off-by: Andre McCurdy <armccurdy@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/distrodata.bbclass

@@ -10,7 +10,7 @@ python distro_eventhandler() {
     with open(logfile, "a") as f:
         writer = csv.writer(f)
         writer.writerow(['Package', 'Description', 'Owner', 'License', 
-            'VerMatch', 'Version', 'Upsteam', 'Reason', 'Recipe Status',
+            'VerMatch', 'Version', 'Upstream', 'Reason', 'Recipe Status',
             'Distro 1', 'Distro 2', 'Distro 3'])
         f.close()
     bb.utils.unlockfile(lf)