lint summary assumes too much about path names

[willkg]

The lint summary assumes that the paths are in the form locale/xx/LC_MESSAGES/messages.po. If that's true, then it prints out a summary like this:

Final Tally:

Number of files examined:            160
Total number of files with errors:    57
Total number of warnings:           1479
Total number of errors:              781

Warnings  Errors  Filename
    81        67  en_US (messages.po)
    28        46  lt (messages.po)
    26        42  th (messages.po)
    30        41  tr (messages.po)
    62        40  eu (messages.po)
    25        40  id (messages.po)
    30        39  hr (messages.po)
    57        37  fy_NL (messages.po)

If that's not true, then it prints a summary that's goofy looking. For example, with Miro, it prints this:

Final Tally:

Number of files examined:             91
Total number of files with errors:    18
Total number of warnings:            101
Total number of errors:               37

Warnings  Errors  Filename
     2         5  resources (tr.po)
     0         4  resources (ko.po)
     4         3  resources (lv.po)
     0         3  resources (zh_TW.po)
     0         3  resources (zh_CN.po)
     0         3  resources (th.po)
     0         3  resources (sl.po)
     3         2  resources (br.po)
     0         2  resources (id.po)

We could print the entire path, but paths can be really long, so I'm not excited about that. We could print the last part of the path, but that might not be enough information. We could use CLDR information to divine the locale from the path parts. Maybe that's the right thing to do.