routing: fix files_annotate_home annotate value to be compatible with Routes >= 2

The routing entry for files_annotate_home had annotate=True. That primarily
served to let the controller files.index differentiate files_annotate_home from
files_home and files_home_nopath . Anything true can work.

test_files.py is creating files_annotate_home URLs in an odd way: Instead of
explicitly specifying it is a files_annotate_home URL, it passes expected
controller parameters and expects routing to find a URL that would provide
these parameters. It thus also has to specify the otherwise "invisible"
annotate value. For Routes < 2, True works just fine. For Routes >= 2, it seems
to expect values that actually can be encoded in URLs.

Thus, instead of True, use '1'.