bug#22947: 25.0.92; xref-find-definitions fails for Perl & etags

[Bob Rogers]

   From: Eli Zaretskii <eliz@gnu.org>
   Date: Thu, 10 Mar 2016 17:31:49 +0200

   . . .

   Bob, can you try etags from the latest emacs-25 branch?  I tried your
   recipe, and it seems to work well with "meals", but I'm not a power
   Perl user, so maybe there's some left-overs that we need to handle.

   Thanks.

Sure; I will do so when I get home this evening.  (If you could give me
a quick recipe for fetching the right branch, it might speed things up;
I'm still a Git beginner.)

   Also, FWIW, I thought I should mention that M-x find-tag works
correctly with the existing etags output . . .

                                        -- Bob