tests: update test-progress to pass our import checker

tests/test-progress.t

@@ -1,7 +1,8 b''
 
   $ cat > loop.py <<EOF
+  > from __future__ import absolute_import
+  > import time
   > from mercurial import commands, registrar
-  > import time
   > 
   > cmdtable = {}
   > command = registrar.command(cmdtable)