Log the whole gpg output when parsing --check-sigs fails

Signed-off-by: Mattia Rizzolo <mattia@debian.org>

keyring/models.py

@@ -262,7 +262,11 @@ class Key(models.Model):
             self.update_check_sigs()
 
         # Check the key data and signatures
-        keys = KeyData.read_from_gpg(self.check_sigs.splitlines())
+        try:
+            keys = KeyData.read_from_gpg(self.check_sigs.splitlines())
+        except Exception as e:
+            log.critical("Couldn't parse gpg output: [%s]", self.check_sigs)
+            raise e
 
         # There should only be keycheck data for the fingerprint we gave gpg
         keydata = keys.get(self.fpr, None)