fetch_local_list: move 'Compiling list of local files' message outside loop

This message gets printed multiple times and adds no value:

    $ s3cmd -v sync -P foo bar s3://baz/
    INFO: Compiling list of local files...
    INFO: Compiling list of local files...
    INFO: Running stat() and reading/calculating MD5 values on 10 files, this may take some time...

Signed-off-by: Steven Noonan <steven@uplinklabs.net>