Fix core Perl module Module::Pluggable such that it can find plugins that live
in symlinked directories.

Patch borrowed/adapted from Nixpkgs.

--- perl-5.16.1/cpan/Module-Pluggable/lib/Module/Pluggable/Object.pm	2015-04-08 23:28:48.120164135 -0500
+++ perl-5.16.1/cpan/Module-Pluggable/lib/Module/Pluggable/Object.pm	2015-04-08 23:30:27.032166704 -0500
@@ -164,7 +164,7 @@
         my $sp = catdir($dir, (split /::/, $searchpath));
 
         # if it doesn't exist or it's not a dir then skip it
-        next unless ( -e $sp && -d _ ); # Use the cached stat the second time
+        next unless ( -e $sp );
 
         my @files = $self->find_files($sp);
 
@@ -279,7 +279,7 @@
                              (my $path = $File::Find::name) =~ s#^\\./##;
                              push @files, $path;
                            }
-                      }, $search_path );
+                      }, "$search_path/." );
     }
     #chdir $cwd;
     return @files;
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<div class='path'>path: <a href='/guix/log/?id=1b0290255399cdd695a4a669d886036654bf3a57'>root</a>/<a href='/guix/log/gnu?id=1b0290255399cdd695a4a669d886036654bf3a57'>gnu</a>/<a href='/guix/log/gnu/packages?id=1b0290255399cdd695a4a669d886036654bf3a57'>packages</a>/<a href='/guix/log/gnu/packages/lirc.scm?id=1b0290255399cdd695a4a669d886036654bf3a57'>lirc.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages/lirc.scm?id=1b0290255399cdd695a4a669d886036654bf3a57&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-03-31 20:51:10 +0300'>2019-03-31</span></td><td><a href='/guix/commit/gnu/packages/lirc.scm?id=36a4366d79a310d05db0de2cf6d5bb3c5e861d4b'>gnu: Fix descriptions to not use quotes.</a></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2019-01-25 13:21:19 +0100'>2019-01-25</span></td><td><a href='/guix/commit/gnu/packages/lirc.scm?id=4c523c45353095d389f1093725069a6475c4f1b3'>gnu: python-lirc: Update to 1.2.1-2.c28708b.</a></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2019-01-15 14:46:44 +0100'>2019-01-15</span></td><td><a href='/guix/commit/gnu/packages/lirc.scm?id=44d10b1f722856ab8e9b942804aa7ef33e2ef739'>gnu: Separate Python core packages from the rest.</a></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2018-11-29 14:11:35 +0100'>2018-11-29</span></td><td><a href='/guix/commit/gnu/packages/lirc.scm?id=c324ad52b6066b4626312a4120b645c43989dd0a'>gnu: lirc: Build reproducibly.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-09-28 18:43:22 +0300'>2017-09-28</span></td><td><a href='/guix/commit/gnu/packages/lirc.scm?id=41342e89ff9a78e48d347c36d830bcfb17f62456'>gnu: lirc: Update to 0.10.1.</a></td><td>Alex Kost</td></tr>
<tr><td><span title='2017-06-26 16:35:56 +0200'>2017-06-26</span></td><td><a href='/guix/commit/gnu/packages/lirc.scm?id=794cced614fd5e0800b478b4a1735f861fa8a5e2'>gnu: lirc: Fix building on Ubuntu.</a></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2016-11-15 22:27:31 +0100'>2016-11-15</span></td><td><a href='/guix/commit/gnu/packages/lirc.scm?id=f3b98f4fec43c951a9e28c67561395992bf190a7'>gnu: Remove python-setuptools and python2-setuptools from inputs (part 2)</a></td><td>Hartmut Goebel</td></tr>
<tr><td><span title='2016-08-19 17:45:05 -0400'>2016-08-19</span></td><td><a href='/guix/commit/gnu/packages/lirc.scm?id=5dee9186b4090422d7eefae2d5028413e5335891'>gnu: python-lirc: Fix file-name.</a></td><td>Leo Famulari</td></tr>
<tr><td><span title='2016-08-16 17:41:23 -0400'>2016-08-16</span></td><td><a href='/guix/commit/gnu/packages/lirc.scm?id=231313f76a2ee64a90381c37a9080ecafadb9865'>gnu: Add python-lirc.</a></td><td>Danny Milosavljevic</td></tr>
<tr><td><span title='2016-07-21 18:09:40 -0400'>2016-07-21</span></td><td><a href='/guix/commit/gnu/packages/lirc.scm?id=de67e922885baf68a746a0484ca0b45e45b0964b'>gnu: Update URLs for sourceforge.net.</a></td><td>Leo Famulari</td></tr>
<tr><td><span title='2016-06-04 15:43:47 +0300'>2016-06-04</span></td><td><a href='/guix/commit/gnu/packages/lirc.scm?id=a88825d9653cab7ba4620f8ccec84e12810f1b4b'>gnu: lirc: Update to 0.9.4.</a></td><td>Alex Kost</td></tr>
<tr><td><span title='2016-04-14 10:38:21 +0300'>2016-04-14</span></td><td><a href='/guix/commit/gnu/packages/lirc.scm?id=fc1adab1487e5ea3c5f6341263df14414ba4e784'>gnu: packages: Use 'search-patches' everywhere.</a></td><td>Alex Kost</td></tr>
<tr><td><span title='2015-10-04 19:19:21 +0300'>2015-10-04</span></td><td><a href='/guix/commit/gnu/packages/lirc.scm?id=678932aa7043436be098e0cb1c82ef463f26af10'>gnu: lirc: Update to 0.9.3.</a></td><td>Alex Kost</td></tr>
<tr><td><span title='2015-03-26 15:47:39 +0300'>2015-03-26</span></td><td><a href='/guix/commit/gnu/packages/lirc.scm?id=e7682771686e2aa90bf4c244a6995db21d0070ae'>gnu: Add LIRC.</a></td><td>Alex Kost</td></tr>