Properly reverse-sort git's tag list again; the rsort on the original output

of the command looked bogus: since each tag ref is prefixed by an iso date and
since commit 94da55d1 by hash, the whole string was of course sorted by this
date and later hash, but not the tag name. This should now make more sense.

src/IDF/Scm/Git.php

@@ -218,13 +218,13 @@ class IDF_Scm_Git extends IDF_Scm
                                                 $cmd, $return,
                                                 implode("\n", $out)));
         }
-        rsort($out);
         $res = array();
         foreach ($out as $b) {
             $elts = explode(' ', $b, 2);
             $tag = substr(trim($elts[1]), 10);  // Remove refs/tags/ prefix
             $res[$tag] = '';
         }
+        krsort($res);
         $this->cache['tags'] = $res;
 
         return $res;