More DRTVWR-550 Teamcity build fix. another piece of python2 syntax leftover in an error handling block

indra/newview/viewer_manifest.py

@@ -1335,7 +1335,7 @@ class DarwinManifest(ViewerManifest):
                             # 'err' goes out of scope
                             sign_failed = err
                     else:
-                        print >> sys.stderr, "Maximum codesign attempts exceeded; giving up"
+                        print("Maximum codesign attempts exceeded; giving up", file=sys.stderr)
                         raise sign_failed
                     self.run_command(['spctl', '-a', '-texec', '-vvvv', app_in_dmg])
                     self.run_command([self.src_path_of("installers/darwin/apple-notarize.sh"), app_in_dmg])